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SLI 580 Lightning Xtreme

post #1 of 10
Thread Starter 
My new rig is shipping and I was wondering if my Seasonic X850 Gold rated PSU would be enough for this rig:

Intel 2600k
16gb Corsair Vengeance
256gb Crucial M4
500gb Western Digital Caviar Black
2x 580 MSI Lightning Xtreme

I'm wondering if I should grab a 1000 watt PSU before I open my 850. I'm going to be lightly OCing my parts CPU to 4.5-4.8 and maybe 100mhz on the Video cards.
post #2 of 10
You will be fine. That series is underrated to ensure it gets the gold standard. The system probably could even run on an x750, but I wouldn't go less than the 850. Power consumption at the wall is a bell curve, so it is better not to use every bit of the psu's capabilities.
Edited by hoth17 - 11/17/11 at 12:18am
post #3 of 10
Personally I felt more comfortable with 1000w, and my rig is fairly similar. Not sure if 3gb 580s pull more than 1.5, but I wanted plenty of headroom. I feel like 850 could be cutting it close.
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post #4 of 10
As amazingly strong as Seasonic PSUs are, I'm not sure if 850 will cut it on two 580s and 2600K overclocked :/ You could always try it and if it doesn't work send it back for a refund and upgrade to a higher wattage.

I don't know the exact power draw on 580s, but I had two 4870X2s back in the day that wouldn't boot on a 950W, lol.
     
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post #5 of 10
ehh, bugginess!
post #6 of 10
of course these test are never very accurate, but it is clear he will be fine. With one overclocked 580 and a 920 at 4ghz the system was at 434.

435
post #7 of 10
You should be fine , i have 1200 but i like going overboard smile.gif
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post #8 of 10
Quote:
Originally Posted by hoth17 View Post

of course these test are never very accurate, but it is clear he will be fine. With one overclocked 580 and a 920 at 4ghz the system was at 434.
435

That's why I said I wasn't sure on the power draw, hah. So yeah, you should be fine especially since Seasonic's ratings are very solid.
     
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post #9 of 10
Thread Starter 
Thanks everyone I'll stick with the Seasonic. PSU Calculator is rating me pretty close but I think I should be good. I Rep + everyone who replied. thumb.gif
post #10 of 10
Yep a good quality 850W is enough. I've seen people run a GTX 480 in SLI with a 750W.
 
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