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.
5VSB Regulation ChartThe following chart shows how the 5VSB rail deals with the load we throw at it.
Efficiency ChartIn this chart you will find the efficiency of FTY1000W at low loads and at loads equal to 20-100% of PSU’s maximum rated load.
Voltage Regulation and Efficiency MeasurementsThe first set of tests reveals the stability of voltage rails and the efficiency of FTY1000W. 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.
| Voltage Regulation & Efficiency Testing Data |
|Test||12 V||5 V||3.3 V||5VSB||Power|
This time we will start with voltage regulation, which overall is at fairly good levels for our standards. The +12V rail managed to stay close to 2% deviation while 5V is well under 3% and 3.3V is a little above it. Regarding efficiency this is at normal levels, for a Gold unit, and even with full load at inferno temperatures it stays near 89%. Also during the full load tests, 100% load and CL2, the unit clearly proved that it can deliver its full power easily even at over 50°C ambient. The only downside we spotted was the noisy fan, especially when we cranked up the heat inside the hot box. In extreme conditions it is definitely loud and probably will annoy users with sensitive hearing.
Efficiency at Low LoadsIn the next tests, we measure the efficiency of FTY1000W 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, 80 and 100W (for PSUs with over 500W capacity). This is important for scenarios in which a typical office PC is in idle with power saving turned on.
| Efficiency at Low Loads |
|Test #||12 V||5 V||3.3 V||5 VSB||Power|
At loads well below 20% of max rated capacity efficiency is not so good. Only with 100W of load the unit manages to surpass the 80% mark while with mere 40W load efficiency is well under 70%. Low loads definitely are not this unit's strong point.
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.
| 5VSB Efficiency|
|Test #||5VSB||Power (DC/AC)||Efficiency||PF/AC Volts|
At the first two tests the 5VSB rail registered excellent efficiency levels while on the last two it ranged at normal levels. As you can see at full load, on this rail, efficiency drops a little bit compared to test#3 (1A load). On the other hand voltage regulation is fairly tight for this rail's standards.
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).
| Idle / Standby |
|Mode||12 V||5 V||3.3 V||5VSB||Power (AC)||PF/AC Volts|
At standby mode energy consumption is restricted below 0.5W so the PSU passes with flying colors the ErP Lot 6 2010 requirements. These modern standby PWM controllers suppress vampire power very well.