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Minimun PSU for a SLI GTX 580?? Also How To Cool..... - Page 3

post #21 of 36
I ran two overvolted 480s on my X 750. Considering they draw more then a 580 I would say you are more then fine with overclocks as well.
    
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post #22 of 36
750w SeaSonic is enough for an OC'ed 580+CPU.

See sig rig.
 
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post #23 of 36
Quote:
Originally Posted by Ratjack View Post

it is ok, but an 850 would be ideal. Just run you 750, if you end up having issues or decide to add anything more to your system then decide on upgrading thumb.gif

750w's ideal.

8665e3c9_gtx580slipowerconsumptionrealworld.png

Even Furmark and Prime simultaneously won't approach 750w draw. He'll actually be in the sweet spot for X760's efficiency.

tweaktownx760test.png

Image from tweaktown.com's review
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post #24 of 36
850w is all you need... been there done that... OC them to 930 mhz... and my cpu to 5.0 ghz.... no issues with my AX850.

Sold them to downgrade ... as its overkill for what I needed... just bought them to play BF3 thumb.gif
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post #25 of 36
Quote:
Originally Posted by mcc21 View Post

850w is all you need... been there done that... OC them to 930 mhz... and my cpu to 5.0 ghz.... no issues with my AX850.
Sold them to downgrade ... as its overkill for what I needed... just bought them to play BF3 thumb.gif

750w is perfect. However we can just scroll on across the previous post with proof and say 850w is what you need. OP already has a X760...

Don't mean to sound condescending but this guy buying another PSU when the one he has will absolutely do the task at hand isn't good.

Edited to not sound like an ahole.
Edited by jagz - 3/5/12 at 11:22am
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post #26 of 36
We recommend a quality 850W power supply for SLI 580s, although a very high quality 750W may suffice as well.
post #27 of 36
Thread Starter 
So now that my PSU should be good for SLI, my next issue would be cooling. Since the cards are so close together, the top card will be suffocated. Other than putting them under a full water block, do you think running an H-80 on each plus a fan on the back blowing across both boards would handle this?
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post #28 of 36
Ive been using a corsair hx750 and have had zero issues. CPU is overclocked to about 1.36v under load, cards overclocked to 120mv (lightning xtremes), ram/vccio over-volted, etc...with 1 ssd/1 hd, and 7 case fans. Even with prime and max memory usage while concurrently running unigine on ultra, I came to about 680 watts. Now if the cards arent even overclocked, its substantially less. Its an 80+ silver certified psu, I believe the ax750's are 80+ gold.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139016&Tpk=ax750

yes they are. Under full fledged battle in bf3 I peak about 580 watts. biggrin.gif
post #29 of 36
Quote:
Originally Posted by kzim9 View Post

So now that my PSU should be good for SLI, my next issue would be cooling. Since the cards are so close together, the top card will be suffocated. Other than putting them under a full water block, do you think running an H-80 on each plus a fan on the back blowing across both boards would handle this?

You are going to mod each card to hold the h80?
post #30 of 36
Quote:
Originally Posted by guitarmageddon88 View Post

You are going to mod each card to hold the h80?

"The mod" as its known is quite effective. I've modded an H50 onto a GTX460 and it worked great. Its gone so far that there is even a company offering mounting kits to adapt a GPU properly to a CPU AIO cooler.
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