Hiper 680W PS for GTX 260 SLI?

[Ornery Platypus]

Hi all,

I'm looking to swap out the dual 8800 GT's in the system below for SLI'd GTX 260's. However, I am concerned my Hiper HPU-5B680 power supply may not be up to the task. The loaded system power draws presented in the AT video card round-ups suggest it can handle it, but is there more to the story? Thoughts?

Current system:

Q9300 OC'd to 3.105 GHz
4 GB RAM
2 x 8800GT 512 MB in SLI
EVGA 750i SLI FTW
Hiper HPU-5B680 PSU
Coolermaster 690 Case
640 GB Western Digital HDD
DVD Burner
Floppy Drive
Vista 64 Ultimate SP1

Thanks!

 

[HOOfan 1]

I think it would be up to the task almost certainly.