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Will my current PSU hold if I get a second GTX580 ? - Page 2

post #11 of 20
Worst case stress test should be around or just a little over 600W for both cards combined, considering the slight GPU overclock. An i7-2600k at 4.4 GHz doesn't need too much power, so worst case full power draw for the whole system should be around 760W. Certainly the X760 can do a little above 760W if required, and it's not like you'll get anywhere near these numbers in normal usage. Under realistic gaming loads, you have no need to worry even if you overclock the GTX 580s.
post #12 of 20
Thread Starter 
Thanks Mike, I'll just order the graphic card and see what happens I'll monitor the fan activity on the X-760 to have an idea of the load during a gaming session. If it's too stressfull I'll just order one of the new 1k+ watt Seasonic PSUs when they'll come out in September ( Here and here )
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post #13 of 20
The Seasonic has 60A combined on the 12v rail and the GTX 580 only requires 22A @ ~250watts...

Pair with your CPU, you'll get by just fine.
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post #14 of 20
You'll be fine.
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post #15 of 20
According to http://www.guru3d.com/article/geforc...sli-review/14:

719 watts was used on a i7 965 and overclocked to 3.75 GHz.

You are running on 4.4, so it will be a very tight squeeze.

However, your PSU is pretty credible, so it should be ok. 850 watts would be perfect though.
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post #16 of 20
Considering the x-750 is 80+ gold, it can definitely handle 2 580s in SLI, as long as you don't overclock them or your cpu too much. Remember the recommended power requirements is usually higher than what the cards actually use. I wouldn't fold with these in sli tho as it use alot more power than you usually use running games.
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post #17 of 20
Quote:
Originally Posted by Recipe7 View Post
According to http://www.guru3d.com/article/geforc...sli-review/14:

719 watts was used on a i7 965 and overclocked to 3.75 GHz.

You are running on 4.4, so it will be a very tight squeeze.

However, your PSU is pretty credible, so it should be ok. 850 watts would be perfect though.
You can't really compare the power drawn by a 45nm chip with that drawn by a 32nm chip.

Personally I think 750 is plenty, I am entirely sure you'll be able to overclock the lot as well and still be within what the PSU can provide. 850W only really becomes entirely necessary when you are dealing with the much more power hungry GTX 480s. Of course 850 does give you a bit of headroom and eliminates any worry but 750 is not anything to worry about with 580s.
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post #18 of 20
Thread Starter 
Wow, thank you guys ! I'm pretty new in this forum, but I think I'll like it here
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post #19 of 20
Quote:
Originally Posted by TC_Fenua View Post
Hi all
I'm wondering if my Seasonic X-760 will be able to power a second MSI GTX 580 Twin Frozr II OC, or if I'll need to upgrade it ? Would be a bummer since I change it like two months ago.

You can check my configuration in my sig.

Thank you for any feedback
Yes..

A single stock GTX580 in games uses up to 220W CLICK HERE

Your PSU has 744W (52A) on a 12+V rail..

CHEERS..
     
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post #20 of 20
You're fine.
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