Large enough power supply for GTx570?

Hi thinking of getting a new Video Card The Nvidia GTX570

but I dont know if I should buy a bigger power supply the a 700w to go with it any thoughts?



My Current Specs

Windows 7 64-bit

AMD Phenom II X6 1090T

8.0GB DDR3 Memory

ATI Radeon 5850

1TB Hard Drive

700 Watt Power Supply|||you only need a 550 watt for that card....700 is plenty|||yes i think its fine but u can never go wrong with more power for down the line