EVGA SuperNOVA 750 GA Power Supply Review

A quality PSU at a good price

(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 @ 22.5°C)12V: 100.02A (160%), 12.131V
5V: 25.4A (127%), 4.969V
3.3V: 30.2A (151%), 3.296V
5VSB: 6.8A (226.7%), 4.857V
OCP (Hot @ 36°C)12V: 100.39A (160.62%), 12.135V
5V: 25.3A (126.5%), 4.971V
3.3V: 29.9A (149.5%), 3.299V
5VSB: 6.8A (226.7%), 4.822V
OPP (Cold @ 21°C)1213.38W (160.03%)
OPP (Hot @ 38°C)1218.27W (160.62%)
OTP✓ (140°C @ 12V Heat Sink)
SCP12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OKAccurate but lower than 16ms
Inrush: NTC Thermistor

The OCP triggering point at 12V is set super high, and the same goes for OPP. Andyson and EVGA did this to cope with power spikes. This is not ideal, though, because such high triggering points practically render the PSU's protection features useless. On the contrary, the over-temperature protection is reasonably 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

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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).

We didn't notice alarmingly high temperatures at the PSU's internals, and given the quality of the parts, the fan speed profile could be more relaxed. Perhaps EVGA and Andyson wanted to stay on the safe side because of the ten-year warranty. 

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Aris Mpitziopoulos
Contributing Editor

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