Will my 850w PSU work for OC'ed XFire?

Hi guys, working on a new Small Form Factor Build (this one gonna be lugged around a lot)

Got all my parts already

Micro ATX board: ASUS Maximus IV Gene-Z/GEN3 LGA 1155 Intel Z68

i7 2600k - will be OC'ed to 4.4 - 4.6 and cooled with corsair H100

Mushkin 240G SSD x2

PSU: Antec HCP 850w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371053

And so far only 1 XFX Black Edition 7970 - this will be OC'ed as well... to ~1200 - 1300mHz (it comes out of the box at 1000, which is about 100 over the stock numbers)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150586

Amd "recommends" 500w PSU for a 1 card setup. I have not been able to find recommendations for 2 cards - however Tom's says that these cards draw 250 (Assuming max of ~300 since Im overclocking just to be safe) My calculations say that i should be just able to squeeze 2 cards into this PC with that PSU... What do you think?
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  1. Hi :)

    Wow I hope you have priced that lot...with those 2 ssd`s plus another 7970...

    LOTS of money...

    And LOTS OF HEAT....

    Personally I wouldnt put that little lot in a small case....you are asking for overheating problems...

    All the best Brett :)
  2. Yea, lol it was a bit pricey... but mobility was a deciding factor with this build. This way, i still get about double the performance of 4-5K 580M SLI Laptop... and for about half the price. I tried to get similar parts to the PC Tom's built - a Micro ATX with 2 580s in SLI - both cards and CPU liquid cooled. Im using the same case as them. The Fractal Arc Mini

    http://www.newegg.com/Product/Product.aspx?Item=N82E16811352008

    I originally intended to put only 1 card in it - but hey if it can handle 2... its a "why not" for the near future.
  3. heat is something you are going to have to think about as the toms guide as you said was watercooled.

    u considered getting a closed loop cpu water cooling system?
  4. Yea, my CPU will be cooled by a corsair H100. Mounted in the top slot of the case
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