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 DeepCool PQ850M at 45c. This makes Test #1 equal to 220W by loading the 12v rail 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 ~380mV drop on the 12v rail and ~20mV 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 ~15mV drop.
Transient Test 2
Loaded/Unloaded
12v/5v
Test #2 is equal to approximately 50% of the rated capacity of the DeepCool PQ850M at 45c. This makes Test #2 equal to 432W by loading the 12v rail 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 ~400mV drop on the 12v rail and ~20mV 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 ~20mV drop.
Transient Load Testing Summary
The Transient Load Tests results for the DeepCool PQ850M are passing and good. In today’s testing, the PQ850M saw the loaded 12v rail post a peak change of ~400mV and the loaded 5v rail post a peak change of ~20mV. The unloaded 5v peak change during the 12v load was ~20mV. Those numbers are passing in an absolute sense and outstanding when it comes to the 5v rail. When we look at comparable units we see that his unit bests the SilverStone DA850 Gold and MSI MPG A850GF. Then we see that is mixed against the ASUS ROG THOR 850W and Enermax REVOLUTION DF 850W. Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!