|Enermax ERV850EWT-G Features & Specs|
|Max. DC Output||850W|
|Efficiency||80 PLUS Gold|
|Operating temperature||0°C - 50°C|
|Protections||Over Voltage Protection|
Under Voltage Protection
Over Current Protection
Over Power Protection
Over Temperature Protection
Short Circuit Protection
|Cooling||139 mm Twister Bearing Fan|
|Dimensions||150 mm (W) x 86 mm (H) x 175 mm (D)|
|Compliance||ATX12V v2.3, EPS 2.92|
|Price at time of review (exc. VAT)||$192|
This unit is 80 Plus Gold certified and it is able to deliver its full power continuously even at 50°C, something typical for an Enermax high-end unit. All protections are present including the rare OTP which is always good to see. The cooling fan utilizes the patented twister bearing which promises much longer lifetime, compared to sleeve bearings and lower noise output. Regarding the unit's footprint, this is quite large with 175mm length and its weight is well over two kilos. Finally the warranty is long enough at five years, although some competitors provide seven and the price is quite stiff. Unfortunately Enermax products are usually priced higher than the competition, since they are made by them and sold exclusively under their own brand, at least the high-end ones.
|Enermax ERV850EWT-G Power Specs|
|Total Max. Power||850W|
Contrary to the single +12V rail trend that many PSUs follow lately, this one features four +12V rails with each having 30A max power. Combined they can deliver almost the full power of the PSU, something that will come handy in a contemporary system that heavily utilizes this rail. The minor rails can give up to 120W combined, a power level that will be enough for every system out there. Finally the 5VSB are a little stronger than the typical 2.5A, which we usually see in units with less than 1kW capacity.
Cables & Connectors, Power Distribution
|ATX connector (550mm)||20+4 pin|
|8 pin EPS12V (600mm)||1|
|4+4 pin EPS12V/ATX12V (600mm)||1|
|6+2 pin PCIe (465mm)||2|
|6+2 pin PCIe (500mm)||4|
|SATA (450mm+150mm) / 4 pin Molex (150mm+150mm)||4 / 4|
|4 pin Molex (450mm+150mm+150mm+150mm) / FDD(+150mm)||4 / 1|
This unit shares the same cable/connector configuration with the 1000W model so it is well equipped with cables. All are nicely sleeved and the PCIe, EPS and the main ATX connector utilize 16AWG wires for reduced resistance thus lower voltage drops. Unfortunately along with the improved resistance their flexibility is also greatly affected so cable management tasks won't be easy. As a side note all EPS and PCIe cables actually feature two connectors, but at about two thirds of their length they split into two cables with each one accommodating a connector. Regarding cable length, in general it would be highly preferable if some cables were longer, especially the 24pin ATX and the PCIe ones. The native PCIe cables have only 465mm length so there may be compatibility problems with some full tower cases.
Enermax placed a label just below the modular sockets, which describes the power distribution. You will also find relevant information about the native cables, too. The power distribution table is as following.
|12V1||2x EPS, ATX|
|12V2||2x Modular PCIe (right socket), three peripheral sockets|
|12V3||2x Modular PCIe (middle socket), two peripheral sockets|
|12V4||2x Native PCIe, 2x Modular PCIe (left socket)|
Power distribution is good since the EPS connectors are separated from the PCIe ones but unfortunately the first are fed by the same rail. Nevertheless the four +12V rails don't leave any other options since this PSU supports many PCIe connectors (eight to be exact, if you purchase an additional cable). So 12V1 handles the two EPS along with the main ATX connector while all other rails feed the PCIe and Peripheral/SATA connectors. If you need four or six PCIe connectors better avoid using the far left socket, since this already powers the native PCIe connectors.