GTX 560TI 448 SLI Power draw

[Mobbba]

Hey all. I'm wondering how big of a powersupply I would need to be able to run the GTX 560 TI Twin Frozr III 448 in an SLI configuration? Currently I have the Rosewill GreenSeries 630 Watt, which is running a single card as well as 8 120mm case fans perfectly fine.

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817182200

GPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127615

Thanks for the help (also any explanation as to why x PSU is good would be nice, I'd like to learn ). If you need any info on any other hardware sitting in my case, let me know!

 

[redeemer]

SLI at least 54 amps, I would go for a TX750!

 

[clutchc]

Each GTX 560ti 448 should draw about 21A @ +12V when fully maxed out. Something you may rarely do. And in SLI they will actually be less than 21A doubled.
http://forums.atomicmpc.com.au/index.php?showtopic=264

Be sure your +12V rail(s) have that and more.
PSU calculator: http://www.thermaltake.outervision.com/