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850w enough for a 2600k & Crossfire build?

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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  1. Best answer
    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 ) :)
  2. 850W is enough, and you will have some extra space to do other things if you wish, like Raidur said.
  3. Plenty of power, if you wanted to save some money.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207001
  4. 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and includes all the latest components...I've found the the calculators on most sites like Newegg are horrendously out of date...
  5. 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.
  6. Best answer selected by RobotAngst.
  7. Wow, Raidur, that's like half of my build right there.

    Thanks for your help, everyone!
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