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Forums › Desktop computing › Two 7950's in SLI : How much power will I need?


74 posts

Master Geek
Topic # 114469 20-Feb-2013 17:46 Send private message

I'm planning on running two asus 7950's in SLI
I was wondering how much power I will need to run them?

My rig as is follows,
asrock extreme 4
intel i5-3570k
2 3tb WD drives
OCZ vertex 4 SSD
CX750M Corsair PSU
16gb/32gb RAM. >haven't decided yet.

Let me know, thanks.

~Dylan

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76 posts

Master Geek
  Reply # 766794 21-Feb-2013 06:56 Send private message

http://www.extreme.outervision.com/psucalculatorlite.jsp



74 posts

Master Geek
  Reply # 766801 21-Feb-2013 07:48 Send private message

Thanks for that tool, it's really handy, I'm going to bookmark it! came out at 476w, so I should be all right!

233 posts

Master Geek
  Reply # 766807 21-Feb-2013 08:28 Send private message

dylandylandylan: Thanks for that tool, it's really handy, I'm going to bookmark it! came out at 476w, so I should be all right!


Its only a guide , I would recommend have an excess of 100 - 150 Watts just incase

220 posts

Master Geek

Subscriber
  Reply # 766849 21-Feb-2013 09:33 Send private message

dylandylandylan: Thanks for that tool, it's really handy, I'm going to bookmark it! came out at 476w, so I should be all right!


seems a little low to be honest.... I would definitely go higher for the headroom (no point in running a PSU to the brink)

So the 750watt PSU you mentioned should be fine

756 posts

Ultimate Geek
  Reply # 766857 21-Feb-2013 09:55 Send private message

I recently had to replace my nice modular highpower due to sudden death :(

But found the new ATX standards and the better PSUs certifications now all have their rating as the minimum constant output and not a ZOMGDIE@MAX rating.

That is my 550 (purchased on similar calculator 475 recomendation and my old busted fan 425 enermax working just fine as an interim replacement) is 550 with burst output of up to 650

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