Power requirement for two 660ti msi in sli?

I also have 3 120mm fans, i5 3570k @ 4.2ghz, msi z77 mobo, 4gb ram, one gtx 660 ti msi, and a cooler master hyper 212 evo. I currently have a corsair 750w enthusiast series psu. So would that be enough for sli or would i have to upgrade my psu?
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  1. considering with one GTX 660ti, you won't break 300w; you could run three GTX 660ti with that PSU and still have power to spare

    Measured power consumption

    System in IDLE = 128 W
    System Wattage with GPU in FULL Stress = 253 W
    Difference (GPU load) = 125 W
    Add average IDLE wattage ~10 W
    Subjective obtained GPU power consumption = ~ 135 Watts

  2. ^ +1

    750w is more than capable for 660ti SLI.
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