A full review is coming for the front page, but in the meantime, here is a brief of the new Corsair HX620W modular PSU that I received from Corsair. Yes, it's modular and it has split 12V rails. The difference between this PSU and most that fall into that category is: it *works* with really heavy loads.
Specs can be found here.
As you'll see in the full review, I loaded it up very well and it didn't miss a beat. The 3 12V rails can handle a 18A each and 50A max on 12V. I tested that out but running both static (up to 44A) and static (27.6A) plus dynamic loads (930 @ 4.8GHz + x1900XT @ 700/800).
Some of the more noteworthy features:
- Guaranteed to deliver rated output at 50°C
- 105°C rated caps instead of 85°C
- Rails automatically share power when one 12V is overloaded (no manual configuration necessary)
- Over 80% efficiency from 140W-620W
- 5-year warranty
Probably the most important thing is how the rails are divided up. The three heaviest draws (PCIe's and the CPU) are each primarily on one of the 3 different 12V rails and that's likely a prime reason it handles loads much better than just about any split 12V rail PSU we've seen so far. Having 18A available on each certainly doesn't hurt either Benching while running the OCed x1900XT on PCIe #1, a static 18A ballast load on PCIe #2 and the 930 Presler @ 4.8GHz with super high Vc (1.65V actual) AND 9.6A ballast load to increase the draw on 12V3, nothing was pulled under 12.00V (CPU ATX) and all other measure points were between 12.12-12.17V while on load. While I wasn't able to measure exact DC output from the PSU, input was 776W on average during the bench loops, which is pretty tough.
Anyone who knows me, knows that I am not necessarily a big fan of modular PSUs and we all know that multiple 12V rails haven't been the best for CF/SLI and/or dual core Prescotts/Preslers. This unit has restored my faith that split 12V rail power supplies don't "have to" suck I'd have no problem recommending this PSU to anyone with CF/SLI. Considering the fact that I used 336W of ballast load and was statically pulling the full rated 18A on a single rail the whole time while running the system with that OC , this PSU is the polar opposite of everything I've seen with split 12V supplies. Corsair definitely gets 2 thumbs up from me on this thing 
Specs can be found here.
As you'll see in the full review, I loaded it up very well and it didn't miss a beat. The 3 12V rails can handle a 18A each and 50A max on 12V. I tested that out but running both static (up to 44A) and static (27.6A) plus dynamic loads (930 @ 4.8GHz + x1900XT @ 700/800).
Some of the more noteworthy features:
- Guaranteed to deliver rated output at 50°C
- 105°C rated caps instead of 85°C
- Rails automatically share power when one 12V is overloaded (no manual configuration necessary)
- Over 80% efficiency from 140W-620W
- 5-year warranty
Probably the most important thing is how the rails are divided up. The three heaviest draws (PCIe's and the CPU) are each primarily on one of the 3 different 12V rails and that's likely a prime reason it handles loads much better than just about any split 12V rail PSU we've seen so far. Having 18A available on each certainly doesn't hurt either
Benching while running the OCed x1900XT on PCIe #1, a static 18A ballast load on PCIe #2 and the 930 Presler @ 4.8GHz with super high Vc (1.65V actual) AND 9.6A ballast load to increase the draw on 12V3, nothing was pulled under 12.00V (CPU ATX) and all other measure points were between 12.12-12.17V while on load. While I wasn't able to measure exact DC output from the PSU, input was 776W on average during the bench loops, which is pretty tough.
Anyone who knows me, knows that I am not necessarily a big fan of modular PSUs and we all know that multiple 12V rails haven't been the best for CF/SLI and/or dual core Prescotts/Preslers. This unit has restored my faith that split 12V rail power supplies don't "have to" suck
I'd have no problem recommending this PSU to anyone with CF/SLI. Considering the fact that I used 336W of ballast load and was statically pulling the full rated 18A on a single rail the whole time while running the system with that OC , this PSU is the polar opposite of everything I've seen with split 12V supplies. Corsair definitely gets 2 thumbs up from me on this thing
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