EVGA SuperNOVA 750 G6 Power Supply Review

EVGA SuperNOVA 750 G6
(Image: © Tom's Hardware)

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Protection Features

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

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OCP (Cold @ 25°C)

12V: 88.4A (141.44%), 12.152V 5V: 32.6A (135.83%), 5.016V 3.3V: 31.7A (132.08%), 3.318V 5VSB: 6.2A (206.67%), 4.961V

OCP (Hot @ 44°C)

12V: 88.2A (141.12%), 12.169V 5V: 32.9A (137.08%), 5.018V 3.3V: 31.3A (130.42%), 3.321V 5VSB: 6.2A (206.67%), 4.956V

OPP (Cold @ 24°C)

1074.16W (143.22%)

OPP (Hot @ 45°C)

1073.16W (143.09%)


✓ (153°C @ 12V Heat Sink)


12V to Earth: ✓ 5V to Earth: ✓ 3.3V to Earth: ✓ 5VSB to Earth: ✓ -12V to Earth: ✓


Proper operation



Surge: MOV Inrush: NTC Thermistor & Bypass relay

The OCP and OPP triggering points are almost the same, under hot and cold conditions, most likely because of the MCU, which is more accurate than analog ICs. Given the platform's high quality and tolerant components, there won't be any problems with the high OCP at 12V and the over 140% OPP triggering point. All other necessary protection features are present and work well. 

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 FLIR E4 camera able to deliver an IR resolution of 320x240 (76,800 pixels).

The hottest parts are the main transformer and the APFC, primary and 12V heat sinks. Still, the operating temperatures are low, given the operating conditions. The electrolytic caps are not close to notable heat sources unless you apply a high load on the DC-DC converters. Nevertheless, modern systems don't draw much power from the minor rails unless you have lots of ARGB components installed. 

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Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.

  • Johnpombrio
    It is amazing how many different power supplies EVGA makes. There is the usual 550,650,750,850, 1000, and 1600 watts. The GA, GM, GT, GQ, a plain, cheap G+, and so many others. Then comes the superNOVA branded ones with their G(gold), P(platinum), and T (titanium) efficiencies. Each of THESE superNOVA families has G2, G3, G5, and G6: P2 through P6; and the super expensive T series. I have an EVGA superNOVA 850 G2 which I bought because it was on a great sale and I trust EVGA in most things. I hope a good rating on a 750 G6 means a good rating on a superNOVA 850 G6 which will be needed with my Alder Lake build coming up.