EVGA SuperNOVA 750 P2 PSU Review

Load Regulation, Hold-Up Time And Inrush Current

To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units. 

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Primary Rails And 5VSB Load Regulation

Load Regulation testing is detailed here.

Hold-Up Time

Our hold-up time tests are described in detail here.

The hold-up time we recorded is much longer than the ATX spec requires, and the power-good signal drops before the rails go out of spec. We're all good here.

Inrush Current

For details on our inrush current testing, please click here.

The inrush current measurements are normal with both voltage inputs.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the PSU's efficiency. The applied load equals (approximately) 10 to 110 percent of the maximum load the supply can handle, in increments of 10 percentage points.

We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.10A. This test reveals whether a PSU is Haswell-ready or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

Test
12V5V3.3V5VSBPower
DC/AC
(Watts)
Efficiency
(%)
Fan
Speed
(RPM)
Fan
Noise
dB(A)
Temp
In/Out
(°C)
PF/AC
(V)
14.340A1.995A1.994A0.986A74.8085.830049.740.923
12.256V5.021V3.307V5.069V87.1538.99115.1V
29.703A2.990A2.995A1.185A149.7390.100051.990.960
12.249V5.015V3.302V5.055V166.1839.95115.1V
315.417A3.498A3.514A1.385A224.8891.220053.830.981
12.245V5.010V3.299V5.043V246.5340.92115.1V
421.120A3.995A4.004A1.590A299.7191.450055.490.984
12.241V5.005V3.294V5.029V327.7241.54115.1V
526.507A4.999A5.011A1.790A374.6791.2992035.944.240.987
12.231V4.999V3.291V5.016V410.4150.74115.1V
631.910A6.014A6.022A1.996A449.6191.0092035.944.610.989
12.216V4.991V3.288V5.002V494.0751.52115.1V
737.314A7.020A7.032A2.200A524.5590.6292035.944.890.991
12.207V4.984V3.284V4.989V578.8752.32115.1V
842.716A8.041A8.051A2.410A599.5490.0092035.945.750.992
12.200V4.977V3.279V4.975V666.1753.84115.1V
948.546A8.546A8.578A2.412A674.5089.30137046.347.460.993
12.193V4.972V3.275V4.972V755.3256.23115.1V
1054.348A9.064A9.075A2.515A749.3888.79137046.347.720.994
12.184V4.967V3.273V4.964V844.0256.86115.1V
1160.540A9.068A9.080A2.519A824.2688.22184052.348.590.995
12.175V4.964V3.269V4.959V934.3158.31115.1V
CL10.099A12.012A12.006A0.004A100.5883.34920 35.945.760.946
12.267V4.981V3.291V5.087V120.6951.65115.2V
CL262.444A1.004A1.003A1.002A773.6189.381370 46.347.910.994
12.175V4.997V3.285V5.033V865.5854.79115.1V

With 20% load,  the efficiency looks good. It's notably below the required 92% at 50% load, though. Under full load, efficiency is very close to the 80 PLUS Platinum specification's 89% requirement. Frankly, we expected higher efficiency at mid-load. Then again, high operating temperatures increase energy losses, so we should expect to see efficiency take a hit in our taxing test environment.

Load regulation is fairly tight on each rail except 5VSB, while the PSU operates in fanless mode at up to the 40% load test. The fan rotates at its lowest speed in the following four tests, while at 90% load and up the fan's noise starts to get annoying. You really have to push the PSU at its limits to make the fan spin at full speed though. At that point, our measurement equipment registers greater than 50 dB(A). Again, we think the fan control circuit should be more granular.

EVGA SuperNova 750 P2
Buy @ Amazon
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9 comments
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  • Nuckles_56
    Thanks for the review Aris. I'd have to say that I'm very impressed with the performance of this unit, it is excellent. It is also nice to see that it has no issues with holdup times either.
  • theyeti87
    It was the P2 650 review on Tom's that helped me decide on buying that unit. Same as this, just 100 watts less powerful. Extremely happy with the stability and quiet operation. Very reliable units!
  • dstarr3
    Any Super Flower review should just read "It's Super Flower. Just buy it."
  • detroitwillfall
    i have this psu and i am happy with it!
  • AfiliaSaga
    I have their G2 750W superflower unit, fantastic performance couldn't be happier with it.
  • David_24
    never knew the 650 was quietter. I got this product 3 months ago cause it's quiet.
  • refillable
    Another great product from EVGA. I regret belittling EVGA with their early PSUs. I also mistakenly said, "I don't like that EVGA PSU"...

    With SuperFlower, they're known to bring greatness now. Anyone looking for "Good PSUs" should go straight to these units and buy them. Exceptional value with excellent performance. Sadly, they're still not available in my country.
  • dstarr3
    606181 said:
    Another great product from EVGA. I regret belittling EVGA with their early PSUs. I also mistakenly said, "I don't like that EVGA PSU"... With SuperFlower, they're known to bring greatness now. Anyone looking for "Good PSUs" should go straight to these units and buy them. Exceptional value with excellent performance. Sadly, they're still not available in my country.


    Right on. Unless you need significantly more or significantly less power, there's no reason to buy anything else.
  • jazzy663
    I like how EVGA has been stepping up their PSU game lately.