EVGA SuperNOVA 850 G7 Power Supply Review

The EVGA SuperNOVA 850 G7 is a super-compact, high-performance PSU.

EVGA SuperNOVA 850 G7
Editor's Choice
(Image: © Tom's Hardware)

Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

Protection Features

Check out our PSUs 101 article to learn more about PSU protection features.

Swipe to scroll horizontally
OCP (Cold @ 31°C)12V: 101.2A (142.97%), 12.160V 5V: 30.7A (127.92%), 5.101V 3.3V: 29.1A (121.25%), 3.367V 5VSB: 4.3A (143.33%), 4.978V
OCP (Hot @ 46°C)12V: 98.2A (138.71%), 12.179V 5V: 28.3A (117.92%), 5.106V 3.3V: 29A (120.83%), 3.369V 5VSB: 4.3A (143.33%), 4.983V
OPP (Cold @ 33°C)1230.95W (144.82%)
OPP (Hot @ 43°C)1196.11W (140.72%)
OTP✓ (142°C @ 12V Secondary Side)
SCP12V to Earth: ✓ 5V to Earth: ✓ 3.3V to Earth: ✓ 5VSB to Earth: ✓ -12V to Earth: ✓
PWR_OKProper Operation
SIPSurge: MOV Inrush: NTC Thermistor & Bypass Relay

OCP at 12V and OPP are highly set, most likely to cope with power spikes. That is not the best way to do it since it makes the PSU's protection features less effective. On the minor rails, the OCP triggering points are correctly set. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn't mention why it is so important to always keep the 3.3V rail's voltage lower than the levels of the other two outputs.

No problems here since the 3.3V rail is always lower than the other two. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Graph

(Image credit: Tom's Hardware)

Ripple Graphs

The lower the power supply's ripple, the more stable the system will be and less stress will also be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with a modified Fluke Ti480 PRO camera able to deliver an IR resolution of 640x480 (307,200 pixels).

The board holding the 12V FETs is the spot reporting the highest temperatures. Still, we didn't notice alarmingly high temperatures, thanks to the highly efficient platform that minimizes energy losses. 

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

Aris Mpitziopoulos
Contributing Editor

Aris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.

  • Co BIY
    Thanks for the review!

    Glad to see a new leader. EVGA is back in it.

    I think a short description of what level of system would be well served/matched to a power supply of this wattage would be a great addition to the review format.

    Something along the lines of : A well performing 850 Watt PSU like this one is well suited to power a gaming system up to an i5 12600K (150 watt TDP) with an RTX 3070 Ti GPU (290 Watt). -