Load Testing

For those of you that are curious as to some of the reasoning and equipment behind our PSU testing program here at TheFPSReview, we have put together an introduction for you. This program is based on what the author developed at [H]ardOCP and utilizes the equipment bequeathed to the author by Kyle Bennett. The testing we are conducting today is exactly as described in that document and start with our 120v, 100v, Torture, and 80 Plus Tests.

120v and 100v Load Testing Results

EVGA SuperNOVA 750 G5 750W Power Supply 120v and 100v Load Testing Results Table

Test #1 is equal to approximately 25% of the rated capacity of the SuperNOVA 750 G5 at 45c. This makes Test #1 equal to 184W by loading the 12v rail to 13a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a. The results of Test #1 show the main positive DC output rails starting above nominal except the 5v rail. The efficiency for this unit is starting off in excellent shape at a value of 90.54% at 120v AC input and 89.65% at 100v AC input. We see the exhaust temperature is 47C at 120v AC input and 48C at 100V AC input.

Test #2 is equal to approximately 50% of the rated capacity of the SuperNOVA 750 G5 at 45c. This makes Test #2 equal to 366W by loading the 12v rail to 27a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. Test #2 sees decreases in our main DC output voltages relative to what we saw with Test #1. The largest changes are up to a 0.02v decrease on the 12v, 5v, and 3.3v rails. The efficiency has moved up to 91.52% at 120v AC input and 90.39% at 100v AC input. We see an exhaust temperature of 50C at 120v AC input and 52C at 100V AC input.

Test #3 is equal to approximately 75% of the rated capacity of SuperNOVA 750 G5 at 45c. This makes Test #3 equal to 572W by loading the 12v rail to 42a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. Test #3 sees the 5v and 3.3v rails drop by 0.02v each. The 12v rail has dropped by up to 0.02v. The efficiency in Test #3 moves down to 90.15% at 120v AC input and up to 88.75% at 100v AC input. We see an exhaust temperature of 52C at 120v AC input and 53C at 100V AC input.

Test #4 is equal to approximately 100% of the rated capacity of the SuperNOVA 750 G5 at 45c. This makes Test #4 equal to 751W by loading the 12v rail to 60a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a. In the final regular test, we see the 12v rail move down by up to 0.03v. The minor rails, however, see a small decrease of 0.01v on the 3.3v rail or no change at all on the 5v rail. The efficiency has dropped as we see it come in at 88.65% at 120v AC input and 86.81% at 100v AC input. We see an exhaust temperature of 55C at 120v AC input and 57C at 100V AC input.

Torture Test

EVGA SuperNOVA 750 G5 750W Power Supply Torture Test 600W Table

The Torture Test is equal to approximately 80% of the rated capacity of the SuperNOVA 750 G5 at 45C full load. This makes the Torture Test equal to 600W by loading the 12v rail to 44a, the 5v rail to 8a, the 3.3v rail to 5a, the +5vsb to 6a, and the -12v to 0.3a. At the end of the Torture Test, the SuperNOVA 750 G5 is still doing well. The DC output voltages are generally in line with what we have been seeing in the 120v load tests. The efficiency is excellent as we see a value of 89.64% and the exhaust temperature is 60C.

80 Plus Load Testing Results

EVGA SuperNOVA 750 G5 750W Power Supply 80 Plus Load Testing Results Table

As we see here, the SuperNOVA 750 G5 posts efficiency values of 88.35%-91.69%-88.17% efficient using 80 Plus’ load testing parameters. This puts the unit right in the 80 Plus Gold standards. However, we do use different equipment than 80 Plus for our testing and there is always a bit of component variation.

Load Testing Summary

The EVGA SuperNOVA 750 G5 did an excellent job in our initial load testing. When we look at the voltage regulation, we see that the SuperNOVA 750 G5 had peak changes of 0.04v on the 12v rail, 0.04v on the 5v rail, and 0.04v on the 3.3v rail. These absolute values are easily in specification and outstanding overall. When we look at the efficiency values posted today, we see that the SuperNOVA 750 G5 ranged from 88.65% to 91.52% efficient at 120v AC input and 86.81% to 90.39% efficient at 100v AC input.

The SuperNOVA 750 G5 also managed to postmarks that put it right in its claimed 80 Plus Gold range when we used the 80 Plus test parameters. Lastly, the exhaust temperature peaked at 55C at 120v AC input, 57C at 100v AC input, and 60C during the Torture Test. Overall then, this makes this unit better than the Phanteks AMP 750 we recently reviewed. With excellent starting results in today’s testing, let’s move on to the Transient Load Tests.

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Paul Johnson

Paul is a long time PC hobbyist and tech enthusiast having gotten his start when he broke his first C64 quickly followed by breaking his first IBM XT. Most notably however, for 12 years, he served as the...

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