PSU Confusion!!!

[Littleone]

Hi, I?m confused about the PSU for my new rig. I know little about these things. Here is my rig ?
E6600
2 x 1GB RAM
120 GB HD
GA P965 DS3 mobo
EVGA 8800GTS 640MB 580MHz

I?m mainly worried about my 8800GTS. I?ve chosen the Thermaltake 680W W0049 PSU. In my country I?ve very little choice available.

http://www.thermaltake.com/product/Power/PurePower/w0049/w0049.asp

Will it be sufficient for my rig? Any suggestion will be helpful. Thanks in advance & thanks for reading.

 

[Nnyan]

Don't sweat it that 680w is more then plenty, 500w would be more then enough.

 

[Littleone]

Thanks for the reply.