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HX620W Still enough?


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I'm doing the research for a new build to FINALLY upgrade from my P4 rig.

I replaced the old Aspire PSU 3 years ago with the Corsair HX620, and it's as rock-solid as I could possibly wish.

With technology changing and things, especially video cards, requiring more power, will my 620 still cut it?

Proposed specs are:


CoolerMaster HAF 932 case

I5-760 CPU

ASUS P7P55D-E Pro board

EVGA GeForce GTX460 Superclocked 1024 MB video card (AR model)

Corsair CMX8GX3M4A1600C​9 XMS3 8 GB PC3-12800 Kit

Noctua NH-U12P SE2 CPU cooler

Samsung DVD burner

Assorted case fans but probably none other than the stock ones.


All the PSU calculators I've tried (including Corsair's) indicate that I should need a PSU between rated 450 and 550 watts. Obviously, the 620 meets that requirement...or does it?


I've requested the 8-pin Pcie connectors that most newer video cards need, so that shouldn't be a disqualifier.



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Did you look at the 12V rail current output(s) from the link? ;): All current PSUs have sufficient 3.3 V and 5 V power so the 12 V rail(s)/ total 12 V current available is what matters.


Yes, AND, I even pulled out the old manual that came with the PSU when I bought it...unfortunately, I don't speak geek very well, so a lot of the tech specs may as well be written in Chinese for as much as they mean to me...so, to avoid cornfuzion, I'll ask.

The video card specs say" Minimum recommended power supply with +12 Volt current rating of 24 Amps," and I know the HX620 has 3 +12v rails of 18 amps each...so it SHOULD be sufficient...


Better to ask and be safe than sorry.

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The HX620 actually has a single 12v rail capable of providing 50A so you should not have any problems at all. The HX620 and HX520 were first produced when the ATX spec said that you could not have more than 20A on any single 12v rail, so virtual rails were created in order to meet these specs. Currently there is no such limitation and all HX620 PSUs should operate as a single 12v rail PSU.
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