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850w enough for a 2600k & Crossfire build?

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January 11, 2011 8:32:45 AM

2600k moderately overclocked... 4.2 mhz or so.
2 crossfired 6950s flashed to 6970s.
And the usual assortment of knobs and fans and a DVD drive and whatnot.

I'm guessing it'll be a little tight at load (which I may never hit?), but the PSU is a Corsair 850HX, which jonnyguru seems to like.

Think 850w will be enough or should I return it for a 1000w?

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a b ) Power supply
January 11, 2011 8:51:58 AM

Nah, 850w should be more than enough.

My guess is your system will use no more than ~650w. 850w will give you some stretching room.

http://www.legitreviews.com/article/1488/18/

(This review used a Core i7 970, and your PSU ) :) 
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January 11, 2011 11:41:56 AM

850W is enough, and you will have some extra space to do other things if you wish, like Raidur said.
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January 11, 2011 1:37:32 PM

Strongly recommend using this site to figure out the wattage you need:
http://www.extreme.outervision.com/psucalculator.jsp

It offers a lot of customization options and includes all the latest components...I've found the the calculators on most sites like Newegg are horrendously out of date...
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a b ) Power supply
January 11, 2011 1:44:27 PM

RobotAngst said:

I'm guessing it'll be a little tight at load (which I may never hit?), but the PSU is a Corsair 850HX, which jonnyguru seems to like.

Think 850w will be enough or should I return it for a 1000w?



It's more than enough. Since it seems you already have it, you might as well keep it.
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January 11, 2011 1:48:38 PM

Best answer selected by RobotAngst.
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January 11, 2011 1:49:12 PM

Wow, Raidur, that's like half of my build right there.

Thanks for your help, everyone!
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!