a new gcard would improve frame rates, but for newer games that cpu would bottle like hell anything before 2007 would see major improvements, u should get
http://www.newegg.com/Product/Prod [...] 6819103210 with hd 4870
------------------------------"Envy is ignorance" - Henry Thoreau : Best quote ever.
build a new quad core system and carry your gpu over to save some money temporary if you want. Also I would wait until windows 7 is out unless you can get the free upgrade
u didnt say u were on skt 939, how can you have ddr2 ram on a 939 board (derogatory comment)!!!! 939 is ddr, if ur using ddr2 its gotta be am2/am2+, if ur sure its 939 however, then upgrade to a tripple core build, or do like me and wait for the athlon ii x4, 2.6ghz quad for $130
------------------------------"Envy is ignorance" - Henry Thoreau : Best quote ever.
It would be a good idea to hold off on a new GPU for a bit anyway. The HD58XX cards are about to come out. Even if you don't decide to get one they'll probably drive down the prices on the current midrange cards like the HD4870/90, GTX 260/75, ect.
Alternately if you have the money an i5/LGA1156 build would be a good buy.
xaira has a point, socket 939 is ONLY DDR, if you're running DDR2 you're on AM2, which significantly improves your processor choices. And your 8800GT is already being bottlenecked by your CPU; trust me, I'm running an X2 at 2.7Ghz and my HD 4670 is bottlenecked sometimes. If you're on AM2, I suggest seeing if there's a BIOS update to support 45nm Phenom II's, if there's not, I'd get an X2 6000 or one of the Phenoms.
Your best bet is a new CPU, and even the fastest socket 939 would be a bad deal, especially since they're so expensive. Best option beyond just a CPU is to rebuild an AM3, get a Phenom II 540 or something, cheap new mobo, and 4Gb of DDR3 and move your GPU over.