Transient 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 that shares a lot of the behind the scenes of the program. 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 will continue with our Transient Testing.

Transient Test 1

Loaded/Unloaded

12v/5v

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 before the addition of the transient load. The results of Test #1 show a ~390mV drop on the 12v rail and ~40mV drop on the 5v rail when each is directly loaded. At the same time that the load was being triggered on the 12v rail, the 5v rail measured a ~30mV drop.

Transient Test 2

Loaded/Unloaded

12v/5v

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 before the addition of the transient load. The results of Test #2 show a ~340mV drop on the 12v rail and ~30mV drop on the 5v rail when each is directly loaded. At the same time that the load was being triggered on the 12v rail, the 5v rail measured a ~25mV drop.

Transient Load Testing Summary

The Transient Load Tests results for the EVGA SuperNOVA 750 G5 are passing and very good on top of that. In today’s testing, the SuperNOVA 750 G5 saw the loaded 12v rail post a peak change of ~390mV, and the loaded 5v rail post a peak change of ~40mV. The unloaded 5v peak change during the 12v load was ~30mV. Those numbers on the minor rails are, in an absolute sense, excellent while the 12v rail is not so excellent. Compared to the recent Phanteks AMP 750 we see that this unit ends mixed with that unit and the most prominent difference is the weakness in the 12v result today. So, this is a nice set of results for the SuperNOVA 750 G5 but not quite class leading due to that 12v rail. Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!

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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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