you are cheaper of:

- buying a 7800 GT PCIe (wich is cheaper) and a new pcie mainboard. Then sell your older mainboard, and in the end you've spend as munch money, but you have a faster setup.

that only applies if he has S939 CPU.

my cpu is a 3200+ 754
mobo = nforce3 DFI

so i 'need' to keep my mobo to let my cpu run fast ( 2.5 ghz )