PSU suitable for ASUS Nvidia geforce gtx 660?

I'm looking to buy a new gpu for my system! I currently have a superchanel s550 PSU and was just wondering if it has enough power for the Asus Nvidia geforce gtx 660!

System specs: Intel DZ77SL-50k motherboard
Intel i5 3570k 3.4GHZ processor
Corsair 4*2gig 1333mhz ddr3 ram

Currently using asus gts 450 gpu!
Any help or suggestions would be appreciated!
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More about suitable asus nvidia geforce
  1. It does since the card only calls for 430watts
  2. yep it will work fine since the 660 consumes only about 20 watts more than your current GTS 450
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