Gigabyte's 6600 GT Dual GPU in SLI better than one 7800 GT?

[Waddles08]

I was looking to build my computer soon and now I was just laying out the parts. As far as graphics I just wanted everyone's opinion on this... which is better? Two Gigabyte 6600 GT Dual GPU's in SLI or a single eVGA 7800 GT CO? At first I wasn't sure that Gigabyte's 6600 GT Dual GPU had SLI capabilities... but at MonarchComputer.com on there configurators you can equip your PC with two of those boards in SLI. Also I know when the card first came out it couldn't take advantage of SLI and came bundled with a Gigabyte mobo. Finally I was wondering if I chose the two Gigabyte's in SLI if an OCZ 520W Modstream PSU would work. I'll be glad to read your opinions on this situation. Thanks.

P.S.
I will be using a DFI Lanparty UT NF4 SLI-DR Expert mobo with an AMD 64 4000+ San Diego CPU and 2GB of dual-channel OCZ memory all in a Lian-Li PC-V1200B chassis.

 

[adamryer]

As far as the graphics cards are concerned i believe that 2 6600GTs in SLI is equal to about a 6800GT, and 2 6800GTs in SLI is almost equal to one 7800GT, so if you can swing it go for the 7800GT. As far as the psu goes, yeah that ocz 580w should work just fine.