GTX 660 PSU Requirements?

Korbi

Honorable
Jun 12, 2013
16
0
10,510
Hey guys, a few months ago I built myself a $1000 gaming pc. I have an MSI GTX 660 TF III OC and an i5 3570k and a Corsair GS700W. My question, to everyone, is that if I were to SLI and get the same MSI GTX 660, would I have to upgrade my PSU? Here's my pc
ASRock Z77 Extreme4
I5 3570k @3.4-3.8 GHz
MSI GTX 660 TF III OC
Corsair GS700W PSU
Ballistix 8GB Ram (2x4)
Coolermaster HAF 912 Mid Tower
So what do you think?