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 Seasonic PRIME PX-1600 ATX3.0. 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 Seasonic PRIME PX-1600 ATX3.0 at 45c. This makes Test #1 equal to 405W by loading the 12v rail to 30a, the 5v rail to 4a, the 3.3v rail to 2a, the +5vsb to 2a, and the -12v to 0.3a. The PRIME PX-1600 ATX3.0 is starting off in a bit mixed shape. The 12v rail is peaking at ~15mV of ripple/noise and 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 Seasonic PRIME PX-1600 ATX3.0 at 45c. This makes Test #2 equal to 806W by loading the 12v rail to 60a, the 5v rail to 9a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. Test #2 sees only minor changes as the 12v rail is coming in at ~25mV of ripple/noise and the minor rails are coming in at less than ~10mV of ripple/noise.
120v Input
100v Input
Test #3 is equal to approximately 75% of the rated capacity of Seasonic PRIME PX-1600 ATX3.0 at 45c. This makes Test #3 equal to 1226W by loading the 12v rail to 90a, the 5v rail to 15a, the 3.3v rail to 10a, the +5vsb to 2a, and the -12v to 0.3a. Test #3 sees the 12v rail peaking at ~25mV of ripple/noise while the minor rails are coming in at ~10mV of ripple/noise.
120v Input
100v Input
Test #4 is equal to approximately 100% of the rated capacity of the Seasonic PRIME PX-1600 ATX3.0 at 45c. This makes Test #4 equal to 1626W by loading the 12v rail to 124a, the 5v rail to 13a, the 3.3v rail to 9a, the +5vsb to 2a, and the -12v to 0.3a. In the final regular test, we see the 12v rail peaking at ~25mV of ripple/noise while the minor rails are peaking at ~10mV of ripple/noise.
Torture Test
The Torture Test is equal to approximately 80% of the rated capacity of the Seasonic PRIME PX-1600 ATX3.0 at 45C. This makes the Torture Test equal to 1286W by loading the 12v rail to 72a, the 5v rail to 11a, the 3.3v rail to 6a, the +5vsb to 2a, and the -12v to 0.3a. At the end of the Torture Test, we see the 12v rail peaking at ~20mV of ripple/noise while the minor rails are peaking at ~10mV of ripple/noise.
DC Output Quality Summary
The overall DC Output Quality of the Seasonic PRIME PX-1600 ATX3.0 is excellent! The PRIME PX-1600 ATX3.0 ended up posting a peak trace amplitude on the 12v rail of ~25mV followed by ~10mV on the 5v rail and ~10mV on the 3.3v rail during our normal tests. The worst relative value among these hit well below ~40% of the ATX12v specification limit and this was on the 12v rail. The minor rails did even better! So, while we do not have other 1600W units to compare to, it seems based on raw numbers that this unit is going to be among the best 1600W units on the market! Let’s move on now and see how all of this wraps up!
Discussion (8 replies)
Join Discussion →That's a crap-ton of power. Perhaps even metric. :) I'd need a whole new UPS to support something that could max that out.
Only thing that has come close to needing a PSU like that was back in the day with Dual or Quad SLI or CrossFire systems lol. But for some reason, even though I don't need it, I want it? :P
Everything needs a PSU like this!
Yeah, I want one too. Ouch on the price but made like a tank and ready to conquer.
I wonder, how does this PS compare to the EVGA 1600W P+ Platinum? I bought the EVGA last year when I put together my latest system. IIRC, this site had a special promotion when purchasing through a link provided ... I did.
The downside I found was the lack of a reasonably priced UPS to handle the load. My older 1200W just wasn't up to the task. The next step up was enterprise level at an enterprise price. There may be some around now ... I don't know; I haven't checked in a while.
Without delving into quality - the Seasonic is a new unit with ATX 3.0 / PCIe 5.0. Not sure if EVGA has started supporting those yet.
as someone who has the 1300 P+ platinum from EVGA... they did not support it when I got mine. Adaptors all the way.
On the topic of UPS's yes they are out there. Mine I've had for several years seems to be just fine but at peak I'm only pulling about 500 watts according to the UPS software.
Ended up getting one of these with the new 3.1 ATX spec. Sure it's overkill, but I usually do that with power supplies in my builds. The PSU quality is very nice, and the cables are great also. Great review as always here.