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PSU enough for SLI conf.

post #1 of 22
Thread Starter 
Hi!

Just recently build rig shown on sig, what was on my mind when i came up with this was if i want to upgrade this in the future, lets say i want to get an another graphics card for extra performance later, is my Corsair HX650 enough to run SLI?

I dont trust on those PSU calculators out there so i came and ask from the professionals.

Dont really know what was i thinking when building, i was going for at least 850W, but somehow i got my self an 650W, maybe i forgot.

So is 650W enough for two graphics card SLI or should i get a new PSU if i want to ugrade later? I think not..? (I guess) Does it come even close?
post #2 of 22
SLI Zone's List of Certified PSU's

edit: the lowest one on the list for a 470/570 is 850. I doubt a 650 will do it.
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post #3 of 22
You'll want to upgrade to a 700-750w PSU for GTX 570 SLi.
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post #4 of 22
I would lean on the 850 for headroom in overclocking etc. They arent that much really anymore either even for a nice modular one
    
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post #5 of 22
Yeah, I agree, a decent 850w unit is hardly any more than a 750. Which is why I went for the 850w Strider+ that I fitted yesterday.
A 650 is enough for a pair of 460s, it's not quite enough for a pair of 570s, especially not if you want to overclock anything. They will run on the 650, at stock, and with no stress tests like furmark.
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post #6 of 22
I would seriously upgrade your PSU to this Seasonic 850w:
http://www.newegg.com/Product/Produc...-102-_-Product

Good luck.
    
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post #7 of 22
Thread Starter 
I was offered to trade my 650HX to an year and a half used 750TX
Will it be worth of it? If i get another GTX 570 will it push it too hard with stock clocks?
post #8 of 22
Profs made the calculator mate lol Guys in here are probably primary amateaurs tbh.
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post #9 of 22
It would work, but running Furmark would stress the psu close to 100% , no headroom for overclocking at all.

Proof: http://hardforum.com/showthread.php?t=1567713

But it's far from perfect
Edited by Kasp1js - 2/8/11 at 4:29am
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post #10 of 22
For 2 570s i would recommend 1000 watt. They demands lots of power. Draws over 200 each also with an overclocked CPU (and bet you overclock your GPU as well then) you will need even more. So get a 1000 watt, and never worry about the PSU again. At least as long as you not go with more than 2 top GPUs.
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