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Tri Sli Power Supply?

Ok so quick question, I'm looking to tri sli with GTX 570s. Already have 2 and want to add another. Right now I have an 850w power supply (this one to be exact: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139022&Tpk=corsair%20850) and I'm not sure if it will be able to take 3 of these cards. What would be a good amount of wattage needed to safely power these 3? I have 2 MSi Twin Frozer GTX 570s and I'm looking to add an EVGA Superclocked 570 which I'm looking to buy off someone for cheap. Any help or information would greatly be appreciated :)
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More about power supply
  1. I good quality 850w should get you through, but I would take the comfort of a 1000w rather.
  2. Best answer
    you might be pushing the PSU past it's limits. with stock 570's tom's showed 784watts running Furmark. any OCing will drive this up even more. you PSU is very solid and would probably take it for a while and you might not necessarily draw max power while gaming. I would plan on getting 950-1000W PSU to be safe.

    tri sli:
    http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html
  3. Best answer selected by taptempo.
  4. jerreddredd said:
    you might be pushing the PSU past it's limits. with stock 570's tom's showed 784watts running Furmark. any OCing will drive this up even more. you PSU is very solid and would probably take it for a while and you might not necessarily draw max power while gaming. I would plan on getting 950-1000W PSU to be safe.

    tri sli:
    http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html



    Thanks! That's what I thought. Also, thank you for the chart. I will be getting a 1000w for the safe side. ;)
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