GTX 670 SLI

I'm thinking of building a computer with two GTX 670's in SLI, but I'm wondering if a 750W power supply will do?
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  1. Easily, they are only 170w cards and I'm running two 170w cards on a 620w PSU.
  2. As long as the power supply has a high power efficiency, than 700+W should be fine. here is the list of SLI capable PSU's

    http://www.geforce.com/Active/en_US/en_US/pdf/PSU.pdf
  3. Ok thanks :)
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