SLi GTX480 on 850watt power supply?

Could I run 2x GTX480's on a Corsair TX850W power supply?

Other specs are in sig. The Cooler Master power supply calculator says I need 750watts of power at 85% load. So, I'm assuming an 850watt unit from Corsair would suffice...

Please help me here, I want to buy something good that will last.

EDIT: system specs: Core i5 750 @ 3.4GHz- 1.14 vcore, ASUS Maximus III Formula, 4GB (2x 2GB) Transcend aXeRam @1700mhz, ASUS ENGTX480 (stock clocks), SupremeFX X-Fi sound card.
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  1. That's what I also though but "the max board power of the 480 is 250 watts". If this is true then that leaves 350 watts for the rest of the machine, which seems more than sufficient. I don't plan on overclocking the cards...

    EDIT: especially considering that BOTH the cards will never be fully stressed at the same time.
  2. it will run. under a stress test this system did not break 800w.

    Core i7 Test System Specs
    - Intel Core i7 965 Extreme Edition (Overclocked @ 3.70GHz)
    - x3 2GB G.Skill DDR3 PC3-12800 (CAS 9-9-9-24)
    - Asus P6T Deluxe (Intel X58)

  3. Thanks man. Although I'm sure it will work just fine I should probably look for a 900W + power supply...
  4. Yea its a tough one.

    Ive just bought an XFX 850w Core edition,with just a single 480 but hope to pick another up at a later date. Noticed this thread and now doing some research. You gonna stick to your 850w or go bigger?
  5. I'm with the furry critter on this one.
    You should be fine with a Corsair TX850.
  6. Thanks Davcon... @ Stuart_B, I'm definitely going to go with the Corsair TX850W or even an HX850W, depending on how much money I have and what not. What else have you got in your pc stuart_b?
  7. My components should arrive tommorow. Specs:

    i5 2500k
    Gigabyte GA P67 UD4
    Asus 480gtx
    XFX 850w Core Edition
    1TB WD HDD
    500GB Hitachi HDD
    NZXT Lexa S

    Will be running a single card at first and will end up picking another up at a later date :) Ile keep you updated so we can see how we both get on.
  8. Aah, decent setup... I plan on staying on socket 1156 for another 2 years or so. I think we'll be fine with the 850W power supplies, I mean, when will our systems ever be at 100% load on GPU's and CPU at the same time?...
  9. I went ahead and bought the HX850W, very happy with it. I am looking forward to getting another GTX480. However, after all that the new PSU costed, I think it'll be a while until I get another...
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