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
Test #1 is equal to approximately 25% of the rated capacity of the Enermax REVOLUTION DF 850W at 45c. This makes Test #1 equal to 220W by loading the 12v rails to 16a, 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 ~320mV drop on the 12v rail and ~35mV 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
Test #2 is equal to approximately 50% of the rated capacity of the Enermax REVOLUTION DF 850W at 45c. This makes Test #2 equal to 429W by loading the 12v rails to 32a, the 5v rail to 4a, the 3.3v rail to 3a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The results of Test #2 show a ~210mV drop on the 12v rail and ~60mV 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 Enermax REVOLUTION DF 850W are passing. In today’s testing, the REVOLUTION DF 850W saw the loaded 12v rail post a peak change of ~320mV and the loaded 5v rail post a peak change of ~60mV. The unloaded 5v peak change during the 12v load was ~30mV. Those numbers are passing, in an absolute sense, and very good to excellent relative to what you can see from similar products on the market. So, rack up another victory for this unit here! Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!
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