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FSP Aurum Xilenser 500 W
Introductionhttp://www.techpowerup.com/reviews/F...mages/logo.png We would like to thank FSP for supplying the review sample. FSP was established in 1993 and currently, according to their claims, they are the 5th largest power supply vendor in the world. This means that this company is quite large and has a strong R&D department. Besides desktop PSUs they are also active in the manufacturing of several product categories including industrial power supplies, open frame PSUs, LCD TV PSUs, adapters, medical and LED power units, power banks and UPS systems. Like many other relevant companies their headquarters are located in Taiwan and most likely their factories in mainland China. FSP recently released two new fanless Aurum Xilenser units, besides the Aurum Pro. The modular Xilensers come in two versions with 400W and 500W capacity and in today's review we are going to take a detailed look at the stronger of both. Here we should note that in addition to the modular Xilensers, FSP released non-modular versions too, for users that don't mind the lack of modular cables but want a lower price. The modular Xilenser 500W or AU-500FL promises zero output noise thanks to its passive design and the lack of a cooling fan, it is 80 PLUS Gold compliant, uses only Japanese capacitors which tend to last longer than the Chinese ones and finally it is equipped with two +12V rails. The AU-500FL uses special designed ventilation holes, unlike most PSUs with honeycomb exhaust grills, which according to FSP allow natural aero dynamics to improve airflow, keeping the internals of the PSU cooler. Well we will see about this in action while testing the unit inside the hotbox, at ultra-high ambient temperature. http://www.techpowerup.com/reviews/F...lose_small.jpg Specifications<table class="tputbl"> <thead> <tr> <th colspan="2">FSP AU-500FL Features & Specs</th> </tr> </thead> <tr> <th scope="row">Max. DC Output</th> <td align="center">500W</td> </tr> <tr class="alt"> <th scope="row">PFC</th> <td align="center">Active PFC</td> </tr> <tr> <th scope="row">Efficiency</th> <td align="center">80 PLUS Gold</td> </tr> <tr class="alt"> <th scope="row">Operating temperature</th> <td align="center">no info</td> </tr> <tr> <th scope="row">Protections</th> <td align="center">Over Voltage Protection<br /> Under Voltage Protection<br /> Over Current Protection<br /> Over Power Protection<br /> Short Circuit Protection</td> </tr> <tr class="alt"> <th scope="row">Cooling</th> <td align="center">Fanless</td> </tr> <tr> <th scope="row">Dimensions</th> <td align="center">150 mm (W) x 86 mm (H) x 160 mm (D)</td> </tr> <tr class="alt"> <th scope="row">Weight</th> <td align="center">1.9 kg</td> </tr> <tr> <th scope="row">Compliance</th> <td align="center">ATX12V v2.3, EPS 2.92</td> </tr> <tr class="alt"> <th scope="row">Warranty</th> <td align="center">5 years</td> </tr> <tr> <th scope="row">Price at time of review (exc. VAT)</th> <td align="center">$135</td> </tr></table> The 80 PLUS Gold criteria are met and the protections include all but OTP (Over Temperature Protection). In a fanless unit we consider OTP as essential and FSP should have included it. The dimensions of the PSU are the standard ones and its weight is normal for its category and design. Also the warranty is pretty long at five years and the price is reasonable for a fanless PSU, which generally tend to be expensive. Finally, regarding max. operating temperature, FSP doesn't give any info, so in our tests we will try to stay close to 40°C, to avoid dramatic situations. <table class="tputbl"> <thead> <tr> <th colspan="9"><strong>FSP AU-500FL</strong> Power Specs</th> </tr> </thead> <tr> <th scope="row">Rail</th> <td align="center">3.3V</td> <td align="center">5V</td> <td align="center">12V1</td> <td align="center">12V2</td> <td align="center">5VSB</td> <td align="center">-12V</td> </tr> <tr class="alt"> <th rowspan="2" scope="row">Max. Power</th> <td align="center">20A</td> <td align="center">20A</td> <td align="center">22A</td> <td align="center">22A</td> <td align="center">2.5A</td> <td align="center">0.3A</td> </tr> <tr> <td colspan="2" align="center">100W</td> <td colspan="2" align="center">492W</td> <td align="center">12.5W</td> <td align="center">3.6W</td> </tr> <tr class="alt"> <th scope="row">Total Max. Power</th> <td colspan="6" align="center">500W</td> </tr></table> FSP equipped the Aurum Xilenser 500 with two +12V virtual rails which can deliver almost the full power of the unit, combined. This greatly enhances usability since in contemporary systems the +12V rail is heavily utilized by almost all components. The minor rails are restricted to 100W, a power level which however will cover every modern system. Finally the 5VSB can output up to 2.5A, a typical capacity for this rail. Cables & Connectors, Power Distribution<table class="tputbl"> <thead> <tr> <th colspan="2" align="center">Native Cables</th> </tr> </thead> <tr> <th scope="row">ATX connector (600mm)</th> <td align="center">20+4 pin</td> </tr> <tr> <th colspan="2" align="center">Modular Cables</th> </tr> <tr class="alt"> <th scope="row">4+4 pin EPS12V/ATX12V (650mm)</th> <td align="center">1</td> </tr> <tr> <th scope="row">6+2 pin PCIe (550mm+100mm)</th> <td align="center">4</td> </tr> <tr class="alt"> <th scope="row">SATA (550mm) / 4 pin Molex (+155mm+155mm)</th> <td align="center">2 / 4</td> </tr> <tr> <th scope="row">SATA (550mm+150mm+150mm)</th> <td align="center">3</td> </tr> <tr class="alt"> <th scope="row">FDD adapter (+150mm)</th> <td align="center">1</td> </tr></table> Only the 24-pin ATX connector sits on a fixed cable while all other cables are modular and they feature a flat profile which will be beneficial for airflow inside the chassis. The only problem is that the cables are wrapped in a rubber sleeving which isn't so flexible. If they used ribbon cables instead, things would be easier, during cable management. Cable length is sufficient but the distance among the PCIe connectors is short. Thankfully the distance among SATA/Molex connectors is compatible with ATX spec recommendation (150mm). Finally all connectors use 18AWG gauges which is the right size. <table class="tputbl"> <thead> <tr> <th colspan="2" align="center">Power Distribution</th> </tr> </thead> <tr> <th align="left" scope="row">12V1</th> <td align="center">ATX, CPU1, Peripheral</td> </tr> <tr class="alt"> <th align="left" scope="row">12V2</th> <td align="center">CPU2, PCIe1, PCIe2</td> </tr></table> Since the EPS connector could draw so much power, that it would overload a single rail, FSP decided to feed the connector from both rails. A wise decision since power distribution is balanced that way. Packaginghttp://www.techpowerup.com/reviews/F...ront_small.jpg http://www.techpowerup.com/reviews/F...ose1_small.jpg http://www.techpowerup.com/reviews/F...ose2_small.jpg http://www.techpowerup.com/reviews/F...ose3_small.jpg The package is quite large and has nice graphics. On the front center we meet the series description displayed in a pretty fancy way while on the bottom left side we find the badges for the Gold efficiency and the five year warranty. http://www.techpowerup.com/reviews/F...ttom_small.jpg http://www.techpowerup.com/reviews/F...lose_small.jpg http://www.techpowerup.com/reviews/F..._top_small.jpg On the bottom side there is a multi-language notice that informs users to visit the official FSP site for detailed information about the product. Apparently there wasn't any space on the box to include even a very brief features description. http://www.techpowerup.com/reviews/F...rear_small.jpg http://www.techpowerup.com/reviews/F...ose1_small.jpg http://www.techpowerup.com/reviews/F...ose2_small.jpg http://www.techpowerup.com/reviews/F...ose3_small.jpg http://www.techpowerup.com/reviews/F...ose4_small.jpg As usual on the rear side you can find interesting information about the product. In this case we found the power specifications table, a description of the available cables/connectors, an efficiency graph and a description of the unit's most interesting characteristics. Contentshttp://www.techpowerup.com/reviews/F...pen1_small.jpg http://www.techpowerup.com/reviews/F...pen2_small.jpg http://www.techpowerup.com/reviews/F...pen3_small.jpg http://www.techpowerup.com/reviews/F...abel_small.jpg http://www.techpowerup.com/reviews/F..._box_small.jpg http://www.techpowerup.com/reviews/F...ndle_small.jpg The contents of the box are neatly arranged and well protected by packing foam. Around the PSU there is a strip of paper which informs the user thatthe PSU must be installed with the arrow ventilation facing upwards, else the hot air will be trapped inside the PSU's case. The modular cables and the rest of the bundle are stored in a smaller box. Finally, besides the user's manual and a set of fixing bolts FSP was kind enough to provide some Velcro straps which will be useful in cable routing tasks. Exteriorhttp://www.techpowerup.com/reviews/F...rter_small.jpg http://www.techpowerup.com/reviews/F...ront_small.jpg http://www.techpowerup.com/reviews/F...lose_small.jpg http://www.techpowerup.com/reviews/F...side_small.jpg http://www.techpowerup.com/reviews/F...ide1_small.jpg http://www.techpowerup.com/reviews/F...rear_small.jpg http://www.techpowerup.com/reviews/F...mmet_small.jpg http://www.techpowerup.com/reviews/F...tail_small.jpg http://www.techpowerup.com/reviews/F...dby1_small.jpg http://www.techpowerup.com/reviews/F...dby2_small.jpg http://www.techpowerup.com/reviews/F..._fan_small.jpg http://www.techpowerup.com/reviews/F...abel_small.jpg http://www.techpowerup.com/reviews/F..._top_small.jpg The unit features a nice dark grey, matte texture powder coating and instead of the classic honeycomb design exhaust holes it uses arrow shaped ones which according to FSP improve airflow. The fan grill looks nice and it has two platic trims around it while on the rear side the modular panel is located on the bottom of the unit and the single fixed wire is fully sleeved back into the housing. Finally the specifications label is located on the bottom of the PSU where we also find some ventilation holes. All in all we liked the external looks of this unit and its finish, which is fingerprint proof. A Look InsideBefore reading this page we strongly suggest to take a look at this article, which will help you understand the internal components of a PSU much better. http://www.techpowerup.com/reviews/F...top1_small.jpg http://www.techpowerup.com/reviews/F...top2_small.jpg http://www.techpowerup.com/reviews/F...top3_small.jpg Once we removed the casing the platform looked familiar and this is because we have recently met a modified version of it in the Be Quiet Dark Power Pro 10 550W. It uses a modern design since a half bridge topology along with an LLC converter is used in the primary side while in the secondary we meet synchronous rectification and VRMs for the generation of the minor rails. In an effort to avoid the use of wires to transfer power to the modular sockets, FSP didn't use a modular PCB but soldered the few sockets directly on the main PCB. http://www.techpowerup.com/reviews/F...pads_small.jpg http://www.techpowerup.com/reviews/F..._top_small.jpg http://www.techpowerup.com/reviews/F...lose_small.jpg Before we start analyzing components let's take a look at the enclosure of the unit. On its bottom we find many thermally conductive pads which help to transfer the heat from the PCB and its components to the casing, which acts as a big heatsink. The top of the case looks empty without a fan installed and on the last of the photos you can see one of the clips that hold the two plastic trims that surround the top exhaust grill. http://www.techpowerup.com/reviews/F...ansa_small.jpg http://www.techpowerup.com/reviews/F...ansb_small.jpg http://www.techpowerup.com/reviews/F...elay_small.jpg The EMI or transient filtering stage starts at the AC receptacle with two Y and one caps, which is equipped with the necessary bleeding resistor to discharge it quickly, once power is cut. On the main PCB we find the remaining components of the transient filtering stage, two CM chokes, one X cap and two Y ones and an MOV. There is also a thermistor responsible for protection against large inrush currents during the start up phase of the PSU and a relay that isolates it from the circuit once the PSU starts. http://www.techpowerup.com/reviews/F...idge_small.jpg The bridge rectifier is cooled by a large dedicated heatsink. Its model number is LL25XB60 and can handle up to 25A of current so it is overspecced for the mere 500W capacity of this PSU. http://www.techpowerup.com/reviews/F...fets_small.jpg http://www.techpowerup.com/reviews/F..._cap_small.jpg http://www.techpowerup.com/reviews/F...hers_small.jpg In the APFC we find three STF22NM60N fets and a C3D04060 boost diode. The two parallel hold up caps are provided by the widely known Nippon Chemi-Con (450V, 220μF, 105°C, KMR series). In order to take a look at the main switchers we had to remove one of the APFC caps. http://www.techpowerup.com/reviews/F..._PCB_small.jpg http://www.techpowerup.com/reviews/F...6901_small.jpg http://www.techpowerup.com/reviews/F..._pcb_small.jpg Both the PFC and LLC controllers are installed on small vertical PCBs. The first is an NCP1654B IC while the second is a Champion CM6901T2X IC. http://www.techpowerup.com/reviews/F...Y280_small.jpg The standby PWM controller is a TNY280PN IC which is soldered directly to the main PCB. http://www.techpowerup.com/reviews/F..._LLC_small.jpg This is the resonant tank of the LLC converter and the two caps next to the main transformer form the capacitor part of the LLC circuit. http://www.techpowerup.com/reviews/F...caps_small.jpg In the secondary side we find three heatsinks which remind us of the ones that Seasonic uses in their X series PSUs. The mosfets responsible for +12V rectification are installed on the solder side of the PCB and the aforementioned three heatsinks help in removing the heat from them. The filtering caps consist of several polymer Capxons and some electrolytic Nippon Chemi-Cons (105°C, KZE series). http://www.techpowerup.com/reviews/F...RMs1_small.jpg http://www.techpowerup.com/reviews/F...RMs2_small.jpg http://www.techpowerup.com/reviews/F...bles_small.jpg The VRMs that generate the minor rails are installed on this PCB. As you can see there are two metal shields around them to restrict EMI transmissions. It seems they are not fed with power through the main PCB but instead two wires transfer +12V and ground to them. Or maybe these wires are supplementary since they are not so thick for the 100W max combined power that the minor rails can deliver. http://www.techpowerup.com/reviews/F..._PCB_small.jpg http://www.techpowerup.com/reviews/F...s_IC_small.jpg The protections IC is installed on a large daughter-board, residing on the secondary side. Its model number is GR8323N and this is the first time we meet this specific IC in a PSU. From its specifications we found out that it supports OCP for up to two +12V virtual rails, matching the rails that this PSU has. http://www.techpowerup.com/reviews/F...kets_small.jpg The few modular sockets are soldered directly to the main PCB, in an effort to minimize energy dissipation, provide lower voltage drops at high loads and of course increase efficiency. In small capacity units where few modular sockets are needed this is a feasible solution, but in higher capacity PSUs a modular PCB is essential for the housing of all modular sockets. http://www.techpowerup.com/reviews/F..._PCB_small.jpg http://www.techpowerup.com/reviews/F...lose_small.jpg http://www.techpowerup.com/reviews/F...ose1_small.jpg http://www.techpowerup.com/reviews/F...ose3_small.jpg http://www.techpowerup.com/reviews/F...fets_small.jpg Soldering quality on the main PCB overall is very good, yet not perfect since we spotted a few blobby solder joints, which however don't pose any threat to the unit's performance and reliable operation. The fets responsible for +12V rectification are installed on this side and they are four Infineon IPD036N04L. Test SetupAll measurements are performed utilizing ten electronic loads (seven Array 3711A, 300W each, and three Array 3710A, 150W each), which are able to deliver over 2500W of load and are controlled by a custom made software. We also use a Picoscope 3424 oscilloscope, a CHY 502 thermometer, a Fluke 175 multimeter and an Instek GPM-8212 power meter. Furthermore, in our setup we have included a wooden box, which along with a heating element is used as a Hot Box. Finally, we have at our disposal four more oscilloscopes (Rigol 1052E and VS5042, Stingray DS1M12 and a second Picoscope 3424) and a CEM DT-8852 sound level meter. In this article you will find more details about our equipment and the review methodology we follow. Finally, if the manufacturer states that the maximum operating temperature of the test unit is only 40°C then we try to stay near this temperature, otherwise we crank up the heat inside the hotbox up to 45-50°C. Voltage Regulation ChartsThe following charts show the voltage values of the main rails, recorded over a range from 60W to the maximum specified load, and the deviation (in percent) for the same load range. http://www.techpowerup.com/reviews/F..._12v_graph.jpg http://www.techpowerup.com/reviews/F...lation_12v.gif http://www.techpowerup.com/reviews/F...n_5v_graph.jpg http://www.techpowerup.com/reviews/F...ulation_5v.gif http://www.techpowerup.com/reviews/F..._33v_graph.jpg http://www.techpowerup.com/reviews/F...lation_33v.gif 5VSB Regulation ChartThe following chart shows how the 5VSB rail deals with the load we throw at it. http://www.techpowerup.com/reviews/F...5VSB_graph.jpg http://www.techpowerup.com/reviews/F...ation_5vsb.gif Efficiency ChartIn this chart you will find the efficiency of AU-500FL at low loads and at loads equal to 20-100% of PSU’s maximum rated load. http://www.techpowerup.com/reviews/F...efficiency.jpg Voltage Regulation and Efficiency MeasurementsThe first set of tests reveals the stability of voltage rails and the efficiency of AU-500FL. The applied load equals to (approximately) 20%, 40%, 50%, 60%, 80% and 100%, of the maximum load that the PSU can handle. In addition, we conduct two more tests. In the first we stress the two minor rails (5V & 3.3V) with a high load, while the load at +12V is only 2A and in the second test we dial the maximum load that +12V can handle while load at minor rails is minimal. <table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="9" class="th1 tac" style="font-size:15pt"> Voltage Regulation & Efficiency Testing Data <br/> FSP AU-500FL</th> </tr> <tr bgcolor="#dddddd"> <td width="115" align="center" bgcolor="#DEE2E7"><strong>Test</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Power<br /> (DC/AC)</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Efficiency</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Temp<br /> (In/Out)</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>PF/AC <br> Volts</strong></td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>20% Load</strong></td> <td align="center" bgcolor="#f9f9f9">6.480A</td> <td align="center" bgcolor="#f9f9f9">1.934A</td> <td align="center" bgcolor="#f9f9f9">1.971A</td> <td align="center" bgcolor="#f9f9f9">1.003A</td> <td align="center" bgcolor="#f9f9f9">100.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">88.69%</td> <td align="center" bgcolor="#f9f9f9">48.5°C</td> <td align="center" bgcolor="#f9f9f9">0.943</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.098V</td> <td align="center" bgcolor="#f0f0f0">5.172V</td> <td align="center" bgcolor="#f0f0f0">3.349V</td> <td align="center" bgcolor="#f0f0f0">4.984V</td> <td align="center" bgcolor="#f0f0f0">112.75W</td> <td align="center" bgcolor="#f0f0f0">37.3°C</td> <td align="center" bgcolor="#f0f0f0">231.5V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>40% Load</strong></td> <td align="center" bgcolor="#f9f9f9">13.326A</td> <td align="center" bgcolor="#f9f9f9">3.894A</td> <td align="center" bgcolor="#f9f9f9">3.979A</td> <td align="center" bgcolor="#f9f9f9">1.210A</td> <td align="center" bgcolor="#f9f9f9">200.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">91.32%</td> <td align="center" bgcolor="#f9f9f9">49.2°C</td> <td align="center" bgcolor="#f9f9f9">0.976</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.067V</td> <td align="center" bgcolor="#f0f0f0">5.136V</td> <td align="center" bgcolor="#f0f0f0">3.317V</td> <td align="center" bgcolor="#f0f0f0">4.957V</td> <td align="center" bgcolor="#f0f0f0">219.00W</td> <td align="center" bgcolor="#f0f0f0">37.7°C</td> <td align="center" bgcolor="#f0f0f0">231.1V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>50% Load</strong></td> <td align="center" bgcolor="#f9f9f9">16.635A</td> <td align="center" bgcolor="#f9f9f9">4.880A</td> <td align="center" bgcolor="#f9f9f9">4.996A</td> <td align="center" bgcolor="#f9f9f9">1.618A</td> <td align="center" bgcolor="#f9f9f9">250.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">91.59%</td> <td align="center" bgcolor="#f9f9f9">52.6°C</td> <td align="center" bgcolor="#f9f9f9">0.983</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.053V</td> <td align="center" bgcolor="#f0f0f0">5.123V</td> <td align="center" bgcolor="#f0f0f0">3.302V</td> <td align="center" bgcolor="#f0f0f0">4.944V</td> <td align="center" bgcolor="#f0f0f0">272.95W</td> <td align="center" bgcolor="#f0f0f0">39.2°C</td> <td align="center" bgcolor="#f0f0f0">231.6V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>60% Load</strong></td> <td align="center" bgcolor="#f9f9f9">19.961A</td> <td align="center" bgcolor="#f9f9f9">5.882A</td> <td align="center" bgcolor="#f9f9f9">6.027A</td> <td align="center" bgcolor="#f9f9f9">2.038A</td> <td align="center" bgcolor="#f9f9f9">300.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">91.32%</td> <td align="center" bgcolor="#f9f9f9">55.3°C</td> <td align="center" bgcolor="#f9f9f9">0.989</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.034V</td> <td align="center" bgcolor="#f0f0f0">5.100V</td> <td align="center" bgcolor="#f0f0f0">3.285V</td> <td align="center" bgcolor="#f0f0f0">4.904V</td> <td align="center" bgcolor="#f0f0f0">328.50W</td> <td align="center" bgcolor="#f0f0f0">40.4°C</td> <td align="center" bgcolor="#f0f0f0">230.2V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>80% Load</strong></td> <td align="center" bgcolor="#f9f9f9">26.789A</td> <td align="center" bgcolor="#f9f9f9">7.884A</td> <td align="center" bgcolor="#f9f9f9">8.113A</td> <td align="center" bgcolor="#f9f9f9">2.456A</td> <td align="center" bgcolor="#f9f9f9">400.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">91.01%</td> <td align="center" bgcolor="#f9f9f9">56.2°C</td> <td align="center" bgcolor="#f9f9f9">0.993</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.005V</td> <td align="center" bgcolor="#f0f0f0">5.073V</td> <td align="center" bgcolor="#f0f0f0">3.254V</td> <td align="center" bgcolor="#f0f0f0">4.886V</td> <td align="center" bgcolor="#f0f0f0">439.50W</td> <td align="center" bgcolor="#f0f0f0">40.8°C</td> <td align="center" bgcolor="#f0f0f0">230.1V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>100% Load</strong></td> <td align="center" bgcolor="#f9f9f9">34.476A</td> <td align="center" bgcolor="#f9f9f9">8.900A</td> <td align="center" bgcolor="#f9f9f9">9.186A</td> <td align="center" bgcolor="#f9f9f9">2.571A</td> <td align="center" bgcolor="#f9f9f9">499.95W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">90.55%</td> <td align="center" bgcolor="#f9f9f9">59.1°C</td> <td align="center" bgcolor="#f9f9f9">0.995</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">11.972V</td> <td align="center" bgcolor="#f0f0f0">5.056V</td> <td align="center" bgcolor="#f0f0f0">3.233V</td> <td align="center" bgcolor="#f0f0f0">4.864V</td> <td align="center" bgcolor="#f0f0f0">552.15W</td> <td align="center" bgcolor="#f0f0f0">41.1°C</td> <td align="center" bgcolor="#f0f0f0">231.0V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>Crossload 1</strong></td> <td align="center" bgcolor="#f9f9f9">1.984A</td> <td align="center" bgcolor="#f9f9f9">12.000A</td> <td align="center" bgcolor="#f9f9f9">12.000A</td> <td align="center" bgcolor="#f9f9f9">0.500A</td> <td align="center" bgcolor="#f9f9f9">125.80W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">85.70%</td> <td align="center" bgcolor="#f9f9f9">56.1°C</td> <td align="center" bgcolor="#f9f9f9">0.959</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.098V</td> <td align="center" bgcolor="#f0f0f0">5.047V</td> <td align="center" bgcolor="#f0f0f0">3.227V</td> <td align="center" bgcolor="#f0f0f0">5.020V</td> <td align="center" bgcolor="#f0f0f0">146.80W</td> <td align="center" bgcolor="#f0f0f0">40.7°C</td> <td align="center" bgcolor="#f0f0f0">231.6V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>Crossload 2</strong></td> <td align="center" bgcolor="#f9f9f9">40.975A</td> <td align="center" bgcolor="#f9f9f9">1.000A</td> <td align="center" bgcolor="#f9f9f9">1.000A</td> <td align="center" bgcolor="#f9f9f9">1.000A</td> <td align="center" bgcolor="#f9f9f9">503.30W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">91.37%</td> <td align="center" bgcolor="#f9f9f9">56.5°C</td> <td align="center" bgcolor="#f9f9f9">0.995</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">11.955V</td> <td align="center" bgcolor="#f0f0f0">5.145V</td> <td align="center" bgcolor="#f0f0f0">3.328V</td> <td align="center" bgcolor="#f0f0f0">4.966V</td> <td align="center" bgcolor="#f0f0f0">550.85W</td> <td align="center" bgcolor="#f0f0f0">40.9°C</td> <td align="center" bgcolor="#f0f0f0">230.9V</td> </tr></table> Since the PSU doesn't have a fan it is natural that the temperature on its top exhaust grill is much higher than the one measured on the front grill (remember that hot air is lighter than the cool air, so it rises). Also as you can see we stayed near 40°C ambient since FSP doesn't provide any info on the unit's max. operating temperature and the lack of OTP could lead to a big "bang" if we over-stressed the PSU, so we opted to stay on the safe side. The small Aurum registered high efficiency and tight voltage regulation overall, especially on the +12V rail which is the one that matters the most. It is very nice to see modern, high efficiency, units being able to keep tight voltage regulation. This in the recent past was very difficult to accomplish, since in their efforts to increase efficiency, the manufacturers tight voltage regulation. Efficiency at Low LoadsIn the next tests, we measure the efficiency of AU-500FL at loads much lower than 20% of its maximum rated load (the lowest load that the 80 Plus Standard measures). The loads that we dial are 40, 60 and 80W. This is important for scenarios in which a typical office PC is in idle with power saving turned on. <table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="8" class="th1 tac" style="font-size:15pt"> Efficiency at Low Loads <br/> FSP AU-500FL</th> </tr> <tr> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Test #</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5 VSB</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Power<br /> (DC/AC)</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Efficiency</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>PF/AC <br> Volts</strong></td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>1</strong></td> <td align="center" bgcolor="#f9f9f9">1.836A</td> <td align="center" bgcolor="#f9f9f9">1.933A</td> <td align="center" bgcolor="#f9f9f9">1.968A</td> <td align="center" bgcolor="#f9f9f9">0.199A</td> <td align="center" bgcolor="#f9f9f9">40.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">77.90%</td> <td align="center" bgcolor="#f9f9f9">0.840</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.202V</td> <td align="center" bgcolor="#f0f0f0">5.172V</td> <td align="center" bgcolor="#f0f0f0">3.353V</td> <td align="center" bgcolor="#f0f0f0">5.020V</td> <td align="center" bgcolor="#f0f0f0">51.35W</td> <td align="center" bgcolor="#f0f0f0">231.0V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>2</strong></td> <td align="center" bgcolor="#f9f9f9">3.419A</td> <td align="center" bgcolor="#f9f9f9">1.933A</td> <td align="center" bgcolor="#f9f9f9">1.968A</td> <td align="center" bgcolor="#f9f9f9">0.398A</td> <td align="center" bgcolor="#f9f9f9">60.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">83.98%</td> <td align="center" bgcolor="#f9f9f9">0.899</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.110V</td> <td align="center" bgcolor="#f0f0f0">5.172V</td> <td align="center" bgcolor="#f0f0f0">3.353V</td> <td align="center" bgcolor="#f0f0f0">5.020V</td> <td align="center" bgcolor="#f0f0f0">71.45W</td> <td align="center" bgcolor="#f0f0f0">230.5V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>3</strong></td> <td align="center" bgcolor="#f9f9f9">4.988A</td> <td align="center" bgcolor="#f9f9f9">1.933A</td> <td align="center" bgcolor="#f9f9f9">1.969A</td> <td align="center" bgcolor="#f9f9f9">0.599A</td> <td align="center" bgcolor="#f9f9f9">80.00W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">87.24%</td> <td align="center" bgcolor="#f9f9f9">0.928</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">12.110V</td> <td align="center" bgcolor="#f0f0f0">5.172V</td> <td align="center" bgcolor="#f0f0f0">3.351V</td> <td align="center" bgcolor="#f0f0f0">5.007V</td> <td align="center" bgcolor="#f0f0f0">91.70W</td> <td align="center" bgcolor="#f0f0f0">230.5V</td> </tr></table> As we expected, due to its low capacity the AU-500FL registers high efficiency even at very low load levels. Indeed even with mere 40W load, efficiency reaches 78% and with 60W and 80W it is far above the 80% mark. 5VSB EfficiencyATX spec states that the 5VSB standby supply's efficiency should be as high as possible and recommends 50% or higher efficiency with 100mA load, 60% or higher with 250mA load and 70% or higher with 1A or more load. We will take four measurements, three at 100 / 250 / 1000 mA and one with the full load that 5VSB rail can handle. <table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="5" class="th1 tac" style="font-size:15pt"> 5VSB Efficiency<br/> FSP AU-500FL</th> </tr> <tr> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Test #</strong></td> <td width="100" align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Power (DC/AC)</strong></td> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Efficiency</strong></td> <td width="100" align="center" bgcolor="#DEE2E7"><strong>PF/AC Volts</strong></td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>1</strong></td> <td align="center" bgcolor="#f9f9f9">0.100A</td> <td align="center" bgcolor="#f9f9f9">0.50W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">65.79%</td> <td align="center" bgcolor="#f9f9f9">0.050</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">5.047V</td> <td align="center" bgcolor="#f0f0f0">0.76W</td> <td align="center" bgcolor="#f0f0f0">231.7V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>2</strong></td> <td align="center" bgcolor="#f9f9f9">0.247A</td> <td align="center" bgcolor="#f9f9f9">1.24W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">71.68%</td> <td align="center" bgcolor="#f9f9f9">0.111</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">5.034V</td> <td align="center" bgcolor="#f0f0f0">1.73W</td> <td align="center" bgcolor="#f0f0f0">231.6V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>3</strong></td> <td align="center" bgcolor="#f9f9f9">1.000A</td> <td align="center" bgcolor="#f9f9f9">4.99W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">74.70%</td> <td align="center" bgcolor="#f9f9f9">0.329</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">4.993V</td> <td align="center" bgcolor="#f0f0f0">6.68W</td> <td align="center" bgcolor="#f0f0f0">231.9V</td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>4</strong></td> <td align="center" bgcolor="#f9f9f9">2.499A</td> <td align="center" bgcolor="#f9f9f9">12.21W</td> <td rowspan="2" align="center" bgcolor="#f9f9f9">74.36%</td> <td align="center" bgcolor="#f9f9f9">0.488</td> </tr> <tr> <td align="center" bgcolor="#f0f0f0">4.886V</td> <td align="center" bgcolor="#f0f0f0">16.42W</td> <td align="center" bgcolor="#f0f0f0">232.4V</td> </tr></table> In the first two tests the 5VSB rail is highly efficient while in the last two, although it easily surpasses the 70% mark that the ATX spec specifies, efficiency surely is not among the highest we have ever seen. Nevertheless a near 75% reading cannot be classified as low when we are referring to 5VSB. Power Consumption in Idle & StandbyIn the table below you will find the power consumption and the voltage values of all rails (except -12V), when the PSU is in idle mode (On but without any load at its rails) and the power consumption when the PSU is in standby (without any load at 5VSB). <table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="7" class="th1 tac" style="font-size:15pt"> Idle / Standby <br/> FSP AU-500FL</th> </tr> <tr> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Mode</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td width="85" align="center" bgcolor="#DEE2E7"><strong>Power (AC)</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>PF/AC Volts</strong></td> </tr> <tr> <td rowspan="2" align="center" bgcolor="#DEE2E7"><strong>Idle</strong></td> <td rowspan="2" align="center" bgcolor="#f0f0f0">12.543V</td> <td rowspan="2" align="center" bgcolor="#f0f0f0">5.198V</td> <td rowspan="2" align="center" bgcolor="#f0f0f0">3.379V</td> <td rowspan="2" align="center" bgcolor="#f0f0f0">5.047V</td> <td rowspan="2" align="center" bgcolor="#f0f0f0">10.94W</td> <td align="center" bgcolor="#f0f0f0">0.422</td> </tr> <tr> <td align="center" bgcolor="#f9f9f9">231.0V</td> </tr> <tr> <td rowspan="2" colspan="5" align="center" bgcolor="#DEE2E7"><strong>Standby</strong></td> <td rowspan="2" align="center" bgcolor="#f0f0f0">0.12W</td> <td align="center" bgcolor="#f0f0f0">0.008</td> </tr> <tr> <td align="center" bgcolor="#f9f9f9">231.7V</td> </tr></table> Phantom power is really low in this fellow and it barely exceeds 0.1W. As it seems ErP Lot 6 compliance is an easy task for most modern units and this is very good for the environment (and your wallet, too). Cross Load TestsFor the generation of the following charts we set our loaders in auto mode, through our custom software, and try over a thousand possible load combinations with +12V, 5V and 3.3V rails. The voltage regulation deviations in each of the below charts are calculated taking the nominal values of the rails (12V, 5V and 3.3V) as point zero. We should note here that we will run this test only with PSUs that have capacity equal or lower than 1000W since it takes way too long and as the capacity increases the completion time increases exponentially. +12V Voltage Regulation Charthttp://www.techpowerup.com/reviews/F...ges/CL_12V.jpg 5V Voltage Regulation Charthttp://www.techpowerup.com/reviews/F...ages/CL_5V.jpg 3.3V Voltage Regulation Charthttp://www.techpowerup.com/reviews/F...ges/CL_33V.jpg Efficiency Charthttp://www.techpowerup.com/reviews/F...efficiency.jpg +12V Ripple Charthttp://www.techpowerup.com/reviews/F...ipple_12V1.jpg 5V Ripple Charthttp://www.techpowerup.com/reviews/F..._ripple_5V.jpg 3.3V Ripple Charthttp://www.techpowerup.com/reviews/F...ripple_33V.jpg 5VSB Ripple Charthttp://www.techpowerup.com/reviews/F...ipple_5VSB.jpg Advanced Transient Response TestsIn these tests we monitor the response of the PSU in two different scenarios. First a transient load (11A at +12V, 5A at 5V, 6A at 3.3V and 0.5A at 5VSB) is applied for 50 ms to the PSU, while the latter is working at a 20% load state. In the second scenario the PSU, while working with 50% load, is hit by the same transient load. In both tests, we measure the voltage drops that the transient load causes, using our oscilloscope. In any case voltages should remain within the regulation limits specified by the ATX specification. We must stress here, that the above tests are crucial, since they simulate transient loads that a PSU is very likely to handle (e.g. starting of a RAID array, an instant 100% load of CPU/VGAs etc.) We call these tests “Advanced Transient Response Tests” and they are designed to be very tough to master, especially for PSUs with capacities lower than 500W. <div style="float:left">http://www.techpowerup.com/reviews/F...ansient_20.gif</div><div style="float:left"><table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="5" class="th1 tac" style="font-size:15pt"> Advanced Transient Response 20%</th> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>Voltage</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Before</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>After</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Change</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Pass/Fail</strong></td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td align="center" bgcolor="#f9f9f9">12.095V</td> <td align="center" bgcolor="#f9f9f9">11.660V</td> <td align="center" bgcolor="#f9f9f9">3.60%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td align="center" bgcolor="#f9f9f9">5.163V</td> <td align="center" bgcolor="#f9f9f9">5.007V</td> <td align="center" bgcolor="#f9f9f9">3.02%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td align="center" bgcolor="#f9f9f9">3.349V</td> <td align="center" bgcolor="#f9f9f9">3.247V</td> <td align="center" bgcolor="#f9f9f9">3.05%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td align="center" bgcolor="#f9f9f9">4.975V</td> <td align="center" bgcolor="#f9f9f9">4.906V</td> <td align="center" bgcolor="#f9f9f9">1.39%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr></table></div><div style="clear:both"></div> <div style="float:left">http://www.techpowerup.com/reviews/F...ansient_50.gif</div><div style="float:left"></div><table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="5" class="th1 tac" style="font-size:15pt"> Advanced Transient Response 50%</th> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>Voltage</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Before</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>After</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Change</strong></td> <td align="center" bgcolor="#DEE2E7"><strong>Pass/Fail</strong></td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td align="center" bgcolor="#f9f9f9">12.044V</td> <td align="center" bgcolor="#f9f9f9">11.871V</td> <td align="center" bgcolor="#f9f9f9">1.44%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td align="center" bgcolor="#f9f9f9">5.118V</td> <td align="center" bgcolor="#f9f9f9">4.972V</td> <td align="center" bgcolor="#f9f9f9">2.85%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td align="center" bgcolor="#f9f9f9">3.301V</td> <td align="center" bgcolor="#f9f9f9">3.190V</td> <td align="center" bgcolor="#f9f9f9">3.36%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td align="center" bgcolor="#f9f9f9">4.930V</td> <td align="center" bgcolor="#f9f9f9">4.862V</td> <td align="center" bgcolor="#f9f9f9">1.38%</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr></table><div style="clear:both"></div> During the first test the +12V rail registered a significant drop, because the main switchers are working in PWM mode at such low loads and the response to transient loads is kind of slow. The situation improved in the second test, where the main switchers are operating in FM mode and the voltage drop was normal this time for a PSU of this capacity. In general the unit performed decently here, considering its low capacity which poses a major handicap in these tests. Below you will find the oscilloscope screenshots that we took during Advanced Transient Response Testing. Transient Response at 20% Loadhttp://www.techpowerup.com/reviews/F...n_20_small.jpg http://www.techpowerup.com/reviews/F...n_20_small.jpg http://www.techpowerup.com/reviews/F...n_20_small.jpg http://www.techpowerup.com/reviews/F...n_20_small.jpg Transient Response at 50% Loadhttp://www.techpowerup.com/reviews/F...n_50_small.jpg http://www.techpowerup.com/reviews/F...n_50_small.jpg http://www.techpowerup.com/reviews/F...n_50_small.jpg http://www.techpowerup.com/reviews/F...n_50_small.jpg Turn-On Transient TestsIn the next set of tests we measure the response of the PSU in simpler scenarios of transient loads, during the turn on phase of the PSU. In the first test we turn off the PSU, dial 2A load at 5VSB and then switch on the PSU. In the second test, while the PSU is in standby, we dial the maximum load that +12V can handle and we start the PSU. In the last test, while the PSU is completely switched off (we cut off power or switch off the PSU's On/Off switch), we dial the maximum load that +12V can handle and then we switch on the PSU from the loader and we restore power. The ATX specification states that recorded spikes on all rails should not exceed 10% of their nominal values (e.g. +10% for 12V is 13.2V and for 5V is 5.5V). http://www.techpowerup.com/reviews/F...5vsb_small.jpg http://www.techpowerup.com/reviews/F..._stb_small.jpg http://www.techpowerup.com/reviews/F..._off_small.jpg On the 5VSB rail we didn't record any voltage spikes and the slope is smooth. On the contrary, at +12V, on both tests, the waveform doesn't ramp up smoothly but makes a big step on the middle. Also in the second test a noticeable spike exists and removes some performance points. Ripple MeasurementsIn the following table you will find the ripple levels that we measured on the main rails of AU-500FL. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB). <table border="1" cellpadding="4" cellspacing="0" bordercolor="#aaaaaa" style="border-collapse:collapse"> <tr> <th colspan="6" class="th1 tac" style="font-size:15pt"> Ripple Measurements<br/> FSP AU-500FL</th> </tr> <tr> <td width="100" align="center" bgcolor="#DEE2E7"><strong>Test</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>12 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>3.3 V</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>5VSB</strong></td> <td width="80" align="center" bgcolor="#DEE2E7"><strong>Pass/Fail</strong></td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>20% Load</strong></td> <td align="center" bgcolor="#f9f9f9">44.4 mV</td> <td align="center" bgcolor="#f9f9f9">16.6 mV</td> <td align="center" bgcolor="#f9f9f9">11.2 mV</td> <td align="center" bgcolor="#f9f9f9">10.8 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>40% Load</strong></td> <td align="center" bgcolor="#f9f9f9">31.2 mV</td> <td align="center" bgcolor="#f9f9f9">23.0 mV</td> <td align="center" bgcolor="#f9f9f9">12.3 mV</td> <td align="center" bgcolor="#f9f9f9">14.7 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>50% Load</strong></td> <td align="center" bgcolor="#f9f9f9">33.8 mV</td> <td align="center" bgcolor="#f9f9f9">24.2 mV</td> <td align="center" bgcolor="#f9f9f9">12.6 mV</td> <td align="center" bgcolor="#f9f9f9">18.5 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>60% Load</strong></td> <td align="center" bgcolor="#f9f9f9">38.2 mV</td> <td align="center" bgcolor="#f9f9f9">26.3 mV</td> <td align="center" bgcolor="#f9f9f9">14.0 mV</td> <td align="center" bgcolor="#f9f9f9">20.0 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>80% Load</strong></td> <td align="center" bgcolor="#f9f9f9">38.9 mV</td> <td align="center" bgcolor="#f9f9f9">35.6 mV</td> <td align="center" bgcolor="#f9f9f9">15.0 mV</td> <td align="center" bgcolor="#f9f9f9">21.0 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>100% Load</strong></td> <td align="center" bgcolor="#f9f9f9">39.3 mV</td> <td align="center" bgcolor="#f9f9f9">37.7 mV</td> <td align="center" bgcolor="#f9f9f9">16.6 mV</td> <td align="center" bgcolor="#f9f9f9">29.9 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>Crossload 1</strong></td> <td align="center" bgcolor="#f9f9f9">39.4 mV</td> <td align="center" bgcolor="#f9f9f9">20.2 mV</td> <td align="center" bgcolor="#f9f9f9">30.4 mV</td> <td align="center" bgcolor="#f9f9f9">11.8 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr> <tr> <td align="center" bgcolor="#DEE2E7"><strong>Crossload 2</strong></td> <td align="center" bgcolor="#f9f9f9">37.3 mV</td> <td align="center" bgcolor="#f9f9f9">37.9 mV</td> <td align="center" bgcolor="#f9f9f9">16.1 mV</td> <td align="center" bgcolor="#f9f9f9">15.5 mV</td> <td align="center" bgcolor="#f9f9f9">Pass</td> </tr></table> Ripple suppression is not among the strong points of this unit, although near 40mV at +12V is not a high reading. The problem lies mainly with the 5V rail which registered close to 38mV ripple during the full load test. This reading is not even close to what we expect to see at this rail from a PSU of the higher-end class. FSP should take a look again at the 5V VRM and try to lower ripple to levels near to the ones that the competition achieves (Seasonic, Super Flower). There is also a possibility that we hit on a bad sample. Ripple at Full LoadIn the following oscilloscope screenshots you can see the AC ripple and noise that the main rails registered (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the oscilloscope's screen the bigger the ripple/noise. For all measurements we set 0.01 V/Div (each vertical division/box equals to 0.01V) as standard. http://www.techpowerup.com/reviews/F...load_small.jpg http://www.techpowerup.com/reviews/F...load_small.jpg http://www.techpowerup.com/reviews/F...load_small.jpg http://www.techpowerup.com/reviews/F...load_small.jpg Ripple at Crossload 1http://www.techpowerup.com/reviews/F..._cl1_small.jpg http://www.techpowerup.com/reviews/F..._cl1_small.jpg http://www.techpowerup.com/reviews/F..._cl1_small.jpg http://www.techpowerup.com/reviews/F..._cl1_small.jpg Ripple at Crossload 2http://www.techpowerup.com/reviews/F..._cl2_small.jpg http://www.techpowerup.com/reviews/F..._cl2_small.jpg http://www.techpowerup.com/reviews/F..._cl2_small.jpg http://www.techpowerup.com/reviews/F..._cl2_small.jpg Performance RatingThe following graph shows the total performance rating of the PSU in comparison with other units we have tested before. To be more specific the tested unit is shown as 100% and all other units’ performance are relative to it. If you want take a look at the exact method we use to calculate the performance rating of each PSU then read this article. http://www.techpowerup.com/reviews/F...mages/perf.gif Performance per DollarFor most of you probably the following graph will be the most interesting, since it shows how much it will set you back the performance of the PSU you want to buy. We looked up the current USD price of each PSU on the popular online shop Newegg and used it along with the relative performance numbers to calculate the Performance per Dollar Index. In case Newegg doesn’t stock a specific unit then we search for it at other popular online shops (Tigerdirect, Amazon) and finally if the unit is not sold in the U.S. we search in popular EU shops (e.g. Caseking) and we convert its price to dollars. Note in the following graph all numbers are normalized by the rated power of each PSU. http://www.techpowerup.com/reviews/F...perfdollar.gif Value and Conclusion<table width="100%" cellpadding="5" cellspacing="0" id="result"> <tr><th>http://www.techpowerup.com/images/dollar.gif</th> <td>
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</tr> <tr> <th>8.7</th> <td>Another good platform from FSP, which confirms that they are trying to establish a permanent position in the champions league of PSU manufacturers. In a recent review I had the chance to take a look at their fresh design which Be Quiet utilized in the new Dark Pro Series P10 550W unit and I admit that I was left very satisfied by FSP's (and Be Quiet's) implementation. Today the new Aurum Xilenser 500W sported an equally good performance with even lower ripple at +12V, although at 5V ripple suppression was average; but after all this is a minor rail with minimal significance compared to +12V.<br /> Surely the strongest point of the new Xilenser is reflected in its passive cooling which leads to minimal noise output. This is the cherry on top for users that hate noisy components and seek for the quietest possible PSU for their systems. If you also take into account the tight voltage regulation, the four PCIe connectors, the good overall built quality and the flat modular cables which may not be highly flexible but still greatly help in increasing the airflow inside the case, then you have a pretty strong pack of features that renders the new AU-500FL a very good PSU.<br/><br/>To sum up, the relatively high ripple on the 5V rail and the lack of OTP cannot spoil the good impression that Xilenser 500W made. This PSU provided very good overall results, has a unique look and it is almost fully modular since only the 24pin ATX cable is fixed. If FSP manages to offer it at a fair price, although fanless PSUs tend to be expensive, then it will be very competitive and a good choice for users who want a fanless PSU for their system. However I think that the current MSRP is way too high and this is the only reason that I didn't give it our Recommended award.</td></tr> </table> |
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