Hello.Hoping for some help. Wanting to build a computer using the gtx 480 fermi. I know this cards old,but it's never been unboxed.Wanting to build a computer with this card for a friends son who's 8 yrs old.Other hardware i'll be using is a i7970 processor, Intel's extreme series gaming motherboard Dx58so,plextor cd rom drive and 2 mechanical hard drives.One being a wd black and the other ia a barracuda.Both are 1TB. To power this system I am wanting to use the Corsair 650 TX.Will this power supply be powerful enough to run everything comfortably? Also memory will be 12 gigs xms3 .4gigs a stick.