600 watts power supply is enough for 2 multi geforce gpu, not SLI?

[Ratha]

my system specification with current power supply 480 watts:
Hard Disk 320 GB
2 GB RAM
Geforce 8800 GTS 320 MB
Asus P5W DH Deluxe motherboard,

now I change to 600 watts power supply, is it enough to add Geforce GTX 260 with 216 cores for graphic process and Geforce 8800 GTS 320 MB for PhsyX calculation only?

 

[DavidC]

probably. i think that graphics card uses around 270 watts max on it's own. find out how much the rest of your computer uses