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 DA1650. This lets us determine what the background noise looks like during testing.
120v Input
100v Input
Test #1 is equal to approximately 25% of the rated capacity of the SilverStone DA1650 at 45c. This makes Test #1 equal to 412W by loading the 12v rail to 32a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a. The SilverStone DA1650 is starting off in excellent shape. The 12v rail is coming in at ~15mV of ripple/noise while the minor rails are peaking at less than ~10mV of ripple/noise.
120v Input
100v Input
Test #2 is equal to approximately 50% of the rated capacity of the SilverStone DA1650 at 45c. This makes Test #2 equal to 829W by loading the 12v rail to 65a, the 5v rail to 5a, 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 still peaking at ~15mV of ripple/noise but the minor rails are now peaking at ~10mV of ripple/noise.
120v Input
100v Input
Test #3 is equal to approximately 75% of the rated capacity of SilverStone DA1650 at 45c. This makes Test #3 equal to 1231W by loading the 12v rail to 97a, the 5v rail to 8a, the 3.3v rail to 4a, the +5vsb to 2a, and the -12v to 0.3a. Test #3 sees the 12v and 3.3v rails peaking at ~20mV of ripple/noise while the 5v rail is coming in at ~15mV of ripple/noise.
120v Input
100v Input
Test #4 is equal to approximately 100% of the rated capacity of the SilverStone DA1650 at 45c. This makes Test #4 equal to 1644W by loading the 12v rail to 130a, the 5v rail to 11a, the 3.3v rail to 7a, the +5vsb to 2a, and the -12v to 0.3a. In the final regular test, we see the 12v and 3.3v rails are peaking at ~20mV of ripple/noise while the 5v rail is peaking at ~10mV of ripple/noise.
Torture Test
The Torture Test is equal to approximately 80% of the rated capacity of the SilverStone DA1650 at 45C. This makes the Torture Test equal to 1317W by loading the 12v rail to 103a, the 5v rail to 9a, the 3.3v rail to 7a, the +5vsb to 2a, and the -12v to 0.3a. At the end of the Torture Test, we see the 12v and 3.3v rails peaking at ~20mV of ripple/noise while the 5v rail is peaking at ~15mV of ripple/noise.
DC Output Quality Summary
The overall DC Output Quality of the SilverStone DA1650 is very good. The DA1650 ended up posting a peak trace amplitude on the 12v and 3.3v rails of ~20mV followed by ~15mV on the 5v rail. The worst absolute value among these hit ~40% of the ATX12v specification limit. Unfortunately, as before, we do not have any other units to directly compare this unit to. However, these small values on the 12v rail over a 1650W range are certainly going to make this unit competitive with whatever other 1650W units may emerge on the market. The 3.3v rail, perhaps, not as much. Let’s move on now and see how all of this wraps up!