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 FSP Hydro PTM PRO 1200W at 45c. This makes Test #1 equal to 305W by loading the 12v rail to 23a, 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 ~400mV 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 ~30mV drop.
Transient Test 2
Loaded/Unloaded
12v/5v
Test #2 is equal to approximately 50% of the rated capacity of the FSP Hydro PTM PRO 1200W at 45c. This makes Test #2 equal to 598W by loading the 12v rail to 46a, 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 ~380mV drop on the 12v rail and ~50mV 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 ~50mV drop.
Transient Load Testing Summary
The Transient Load Tests results for the FSP Hydro PTM PRO 1200W are passing. The peak 12v change when loaded was ~400mV while the 5v rail when loaded saw a peak change of ~60mV. The peak 5v change when the 12v rail was loaded was ~50mV. In addition to these results passing in an absolute sense, these results are mixed with what we saw from the SilverStone ST1200-PTS. So, while not mind blowing in any way, the Hydro PTM PRO 1200W certainly is competitive with the other 1200W unit we have seen to date. Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!