DC Output Quality
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 examination of the DC Output Quality.
Control Test Graphing
This image is the blank background control test on an unused connector from our SM-8800 during the testing of the SilverStone NJ600. This lets us determine what the background noise looks like during testing.
120v and 100v Input
Test #1 is equal to approximately 25% of the rated capacity of the SilverStone NJ600 at 45c. This makes Test #1 equal to 149W by loading the 12v rail to 10a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a. The SilverStone NJ600 is starting off a bit active on the 12v rail as it is peaking at ~20mV of ripple/noise. On the other hand, 5v and 3.3v rails are peaking at less than ~10mV of ripple/noise.
Test #2 is equal to approximately 50% of the rated capacity of the SilverStone NJ600 at 45c. This makes Test #2 equal to 301W by loading the 12v rail to 21a, the 5v rail to 4a, the 3.3v rail to 3a, the +5vsb to 2a, and the -12v to 0.3a. Test #2 sees only minor changes as the 12v rail is coming in at ~15mV of ripple/noise while the minor rails are still coming in at ~10mV of ripple/noise (5v rail) or less (3.3v rail).
Test #3 is equal to approximately 75% of the rated capacity of SilverStone NJ600 at 45c. This makes Test #3 equal to 463W by loading the 12v rail to 33a, the 5v rail to 6a, the 3.3v rail to 4a, the +5vsb to 2a, and the -12v to 0.3a. Test #3 sees the 12v rail move up to ~20mV of ripple/noise again while the minor rails are both coming in at less than ~10mV of ripple/noise this time.
Test #4 is equal to approximately 100% of the rated capacity of the SilverStone NJ600 at 45c. This makes Test #4 equal to 613W by loading the 12v rail to 47a, the 5v rail to 3a, the 3.3v rail to 2a, the +5vsb to 2a, and the -12v to 0.3a. In the final regular test, we see the 12v rail peaking at ~20mV of ripple/noise while the minor rails are peaking at less than ~15mV of ripple/noise (5v rail) or ~10mV of ripple/noise (3.3v rail).
Torture Test
The Torture Test is equal to approximately 80% of the rated capacity of the SilverStone NJ600 at 45C. This makes the Torture Test equal to 496W by loading the 12v rail to 35a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. At the end of the Torture Test, we see the 12v and 5v rails have peaked at ~15mV of ripple/noise while the 3.3v rail is peaking at ~10mV of ripple/noise.
DC Output Quality Summary
The overall DC Output Quality of the SilverStone NJ600 is excellent today. The ripple/noise values started the day off a bit active on the 12v rail but quiet on the other rails. As testing went on though, the unit did not see much increase in trace amplitudes and, overall, ended up very close to where they started. Indeed, the 12v rail showed a peak ripple/noise value of ~20mV while the minor rails saw peak values of ~15mV on the 5v rail and ~10mV on the 3.3v rail. That would make these absolute values excellent. Once more, we don’t have anything to directly compare this unit to, however, given what we know of the units on the market, today, this unit would easily be one of the better ones out there among comparable products in this regard. All in all, this unit did an awesome job in this aspect of testing! Let’s move on now and see how all of this wraps up!