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$100 PSU for 2x 5850's?

post #1 of 66
Thread Starter 
What's the best recommendation for a PSU to run dual 5850's? Nothing special on the CPU side (probably a single core AMD), and it'll just be used for GPU farming...
post #2 of 66
Tx650. Ran my pair of 5850s like a champ.

edit: http://www.newegg.com/Product/Produc...-020-_-Product

$75 AR.
post #3 of 66
Thread Starter 
Quote:
Originally Posted by sub50hz View Post
Tx650. Ran my pair of 5850s like a champ.

edit: http://www.newegg.com/Product/Produc...-020-_-Product

$75 AR.
Did you just use some power adapters? The 5850 requires 1x6 pin and 1x8 pin, and the tx650 only has 2x6+2 pin connectors. I actually have that PSU in my server right now though, very happy with it.

What about this one?
http://www.newegg.com/Product/Produc...82E16817153136

EDIT: And what are my chances of finding a PSU that can run 3x 5850's for $100 or less?
post #4 of 66
Quote:
Originally Posted by SgtSpike View Post
Did you just use some power adapters? The 5850 requires 1x6 pin and 1x8 pin, and the tx650 only has 2x6+2 pin connectors. I actually have that PSU in my server right now though, very happy with it.
I used adapters just fine. And all reference 5850s use 2 x 6-pin, although lots of non-reference (including the DirectCu I have) use the 1x6/1x8 layout.

edit: I built a system a few weeks ago for my optometrist with one of those TR2s -- pathetically short cables.
post #5 of 66
Thread Starter 
Ok, the Tx650 sounds good then, thanks.

Toms Hardware shows power consumption @ 460w with an overclocked i7 and 2x 5850's on full load. Do you think the Tx650 could handle 3x 5850's and a single core AMD processor pretty much idling by? I'm inclined to think it would...
post #6 of 66
I'm willing to bet it would as well, although you might have to get creative with cable extensions and adapters. Luckily, I think NZXT makes some of those nicer sleeved ones, if you're not inclined to DIY (which I am not, and I use their EPS and ATX extensions in my sig rig).
post #7 of 66
This is what you're looking for..partially modular, updated tech vs. TX650, 4 PCI-E connectors.
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post #8 of 66
You could run 5850s off a neo eco 520C, but if you wanted to OC a lot might be safer on the 650. For under $100 you're probably out of luck trying to run 3 5850s. The XFX 750 probably could handle it, and it's like $110 AR, so it's close.
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post #9 of 66
Quote:
Originally Posted by SgtSpike View Post
Ok, the Tx650 sounds good then, thanks.

Toms Hardware shows power consumption @ 460w with an overclocked i7 and 2x 5850's on full load. Do you think the Tx650 could handle 3x 5850's and a single core AMD processor pretty much idling by? I'm inclined to think it would...
NOOO! Don't get the Corsair TX-650. The Antec TruePower New 650W is a better Power Supply in every aspect. It has much better ripple suppression, is more efficient, has 4 native 6+2 pin PCI-E connectors, and is semi-modular. That, and it costs less at only $80.

Why people keep recommending the Corsairs at this price point is beyond me.

From what you're talking about, to me it seems that the Tri-GPU config you're talking about would be for folding. Am I correct? If that's so, don't worry. I wouldn't game with three of them, though. The power consumption would probably be in the 600+W range. For folding, you're fine.

I'm still wondering why you're using AMD cards for folding, though.
    
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post #10 of 66
Quote:
Originally Posted by LOL_Wut_Axel View Post
Why people keep recommending the Corsairs at this price point is beyond me.
Because I have used one, and it performed exceptionally well. Additional bonus -- Corsair warranty is excellent. Nothing against Antec, and the TPN is a great unit, but since PSUs have a tendency to be used longer than any other PC component, the warranty is a big deal for me.
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