One more question....what sort of mobo would you suggest that would let me use my 4 gigs of ddr 800mhz memory and same cpu for an sli setup?
You have written it wrong,your RAM is DDR2.
*XFX Nvidia nforce 790i Ultra. (DDR 3 Memory Support)
*Intel DP45SG. (DDR 3 Memory Support)
*ASUS P5K-V.(DDR 2 Memory Support) (Deactivated)
Buddy u will hardly get a motherboard with DDR 2 memory support which is having more than one PCI-E (X16) slots.
So i recommend u to put your hands on DDR 3 memory support motherboard.
In the above ASUS P5K-V supports DDR 2 but it is now out of stock.
I recommend you to stay with your current setup n save money.
And with more money u should go for Core i3,Core i5 or Core i7 setup because it is advanced technology.
And still your computer is powerful enough to play any recent games.
Just upgrade your graphic card because in this way your money will not be wasted because u can fit that graphic card
on your new setup (system).
I repeat again Stay with your current setup and save money for the new and advance setup.
Best of luck.