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 SilverStone SX1000 at 45c. This makes Test #1 equal to 268W by loading the 12v rail to 20a, 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 ~305mV 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 ~35mV drop.
Transient Test 2
Loaded/Unloaded
12v/5v
Test #2 is equal to approximately 50% of the rated capacity of the SilverStone SX1000 at 45c. This makes Test #2 equal to 492W by loading the 12v rail to 38a, the 5v rail to 3a, the 3.3v rail to 2a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The results of Test #2 show a ~300mV drop on the 12v rail and ~45mV 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 ~45mV drop.
Transient Load Testing Summary
The Transient Load Tests results for the SilverStone SX1000 are passing and generally good. In today’s testing, the SX1000 saw the loaded 12v rail post a peak change of ~305mV, and the loaded 5v rail post a peak change of ~45mV. The unloaded 5v peak change during the 12v load was ~45mV. Those numbers are, in an absolute sense, in the specification and good. In a relative sense, when we consider that this unit is an SFX-L product, these look a bit better still.
That said, we have not seen another SFX-L unit, let alone one with this capacity, to compare this unit to. So, from a market perspective, it is a bit difficult to place this unit. However, I would not expect it to fare poorly given what we see from the ATX12/EPS units and units of this capacity in general. Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!