EVGA Supernova 850 G2 Power Supply Review
by E. Fylladitakis on May 30, 2014 6:00 AM EST- Posted in
- Cases/Cooling/PSUs
- PSUs
- EVGA
- Super Flower
Hot Test Results
From the tables below, it can be seen that the output power quality of the EVGA Supernova 850 G2 is well above average. The maximum voltage ripple that our instruments recorded is below 24 mV under maximum load, even with the unit heavily cross-loaded, which is nothing short of exceptional. Voltage regulation is about 2% for all voltage lines, a good figure but not unusual for a high performance power supply.
| Main Output | ||||||||
| 172.78 W | 428.49 W | 638.78 W | 845.38 W | |||||
| 20.33% | 50.41% | 75.15% | 99.46% | |||||
| Line | Amperes | Volts | Amperes | Volts | Amperes | Volts | Amperes | Volts |
| 3.3 V | 3.89 | 3.39 | 9.73 | 3.36 | 14.59 | 3.33 | 19.45 | 3.32 |
| 5 V | 3.89 | 5.12 | 9.73 | 5.10 | 14.59 | 5.04 | 19.45 | 5.02 |
| 12 V | 11.48 | 12.17 | 28.69 | 12.07 | 43.03 | 12.01 | 57.38 | 11.91 |
| Line |
Regulation (20% to 100% load) |
Voltage Ripple (mV) | |||||
| 20% Load | 50% Load | 75% Load | 100% Load | CL1 12V | CL2 3.3 V + 5V | ||
| 3.3 V | 2.1% | 6 | 8 | 14 | 16 | 4 | 18 |
| 5 V | 2.0% | 8 | 8 | 12 | 16 | 8 | 20 |
| 12 V | 2.2% | 8 | 12 | 16 | 20 | 24 | 12 |
The high ambient temperature has a serious impact on the energy conversion efficiency of the EVGA Supernova 850 G2, reducing the average nominal load (20-100%) efficiency down to 89.2 % and the maximum efficiency of the PSU to 91.3%. Higher temperatures are expected to have a negative impact on the performance of any PSU but a drop of nearly 2% across the entire range is more than normal. The performance remains good but it would seem that this unit does not really like very hot environments.
With the Supernova 850 G2 being tested inside our hot box, the fan begins spinning as soon as the load exceeds 200 Watts. The thermal control circuit reacts well under these adverse conditions, ditching acoustic comfort in order to keep the temperatures of the unit within a safe limit. As such, the Supernova 850 G2 becomes notoriously loud while heavily stressed inside our hotbox, but the temperatures of the unit do not reach figures that would make us concerned about its longevity. We should clarify that the Supernova 850 G2 is not a cool-running unit, as the heatsink temperatures are rather high for such a design, but the thermal control circuit makes sure that they will not reach unsafe levels.
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NvidiaWins - Thursday, June 25, 2015 - link
Using a HX850 watt gold, this would be a good replacement@129$tazmo8448 - Monday, July 27, 2015 - link
Nice photos of the box and what it looks like out of the box but wheres the test data and a photo with the lid off so we can peek inside to see the 'guts?' do they really use Nippon capacitors? is the fan bearing sleeved (think bushing) or ball bearing? the 850 G2 review did this, was this review done on Fri afternoon? C'mon man give us the meat and potatoes so we can make a choice not just a laydown of the components in HD.