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XFX 750W Black Edition enough for GTX 570 SLI

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September 28, 2011 10:09:50 PM

So i just bought an XFX 750W Black Edition because after some research i found out it would be sufficient for GTX 570 SLI, but now after i've purchased it i've heard from several people that it won't be enough. I also want to overclock eventually so i really need some extra power.

Should i return it and buy the 850W version or will it be fine.
September 28, 2011 10:38:26 PM

Adam2190 said:
So i just bought an XFX 750W Black Edition because after some research i found out it would be sufficient for GTX 570 SLI, but now after i've purchased it i've heard from several people that it won't be enough. I also want to overclock eventually so i really need some extra power.

Should i return it and buy the 850W version or will it be fine.


You need to add up all the wattages required by all of the components that make up your system (motherboard, videocard, peripheral cards, case fans, etc.) and multiply that figure by at least 1.5 X of the total to see how much you'll actually need (TOTAL WATTAGE). Remember that it's always good to have extra than to need it and not have it! If the final TOTAL is under the 750W value then it should suffice but if not, then go ahead and return it for the 850W version. Good luck!
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September 28, 2011 11:43:01 PM

While tweaking some of the options, mostly CPU overclocking it doesn't seem to go over 750W at any point while 90% load is selected, however it does with 100% load.

Woud it be ok or should i play it safe and upgrade?
September 29, 2011 4:24:55 PM

I think the XFX 750W BE is fine (I have one).
And since this PSU is Nvidia Certified for GTX 470 SLI use.
GTX 570 consumes the same wattage than GTX 470 (Geforce.com website verified). It's plausible to think that the PSU can handle it finely.
September 29, 2011 4:33:26 PM

I think i'll stick with it then. since i got it for £70 on special offer and it would cost about £40 more to return it and upgrade to the 850W.
September 29, 2011 6:50:38 PM

This link above is a pretty decent way to give a major direction in power requirements.
I would change a few things, like, do with the CPU, the same as the GPU.

Just get the CPU power wattage and divide it by 12, to get the 12V amperage draw to CPU (since modern CPU relay in 12V to be powered). And after that just sum 5A. I think it's a more realistic approach, HDs, DVDs and all others, I think uses the 5V rail, not the 12V.
Some fans uses the 12v, but it's like 0,1A to 0,5A not demanding afterall.
September 30, 2011 1:14:59 PM

Ok thanks guys.
February 27, 2012 6:49:34 AM

Adam2190 said:
Ok thanks guys.

Hi Adam,

I was also looking to buy another 570 HD to do SLI. I also have a 750W PSU from OCZ and I was wondering if you experienced any problems with your SLI set up on your PSU.
!