What graphics card would be best for a dual core amd athlon 64 x2, hp a1730n ?

im looking to update my pc it currently has 2 gigs of ram and a gforce 6150 le graphics card i want to update it so i can play crysis and bioshock at 60 fps + im not very computer hardware saavy all i know is when i play bioshock now its at the poorest resolution and the worst graphics and if i turn up the settings it getts all choppy any help i want the best that money can buy for my pc graphics card wise im going to get 4 gigs on it but i know nothing of the graphics card and compatibility with the mother board ...ect

What graphics card would be best for a dual core amd athlon 64 x2, hp a1730n ?

get an 8800 nvidia ultra .. u may need a bigger powersupply ... after that if u want more ur going to need a new motherboard that supports sli ... 4 gigs of ram isnt going to work unless u know how to get windows to detect it ... i wouldnt go more than 3 really it will be enough .. 2 would probably actually be fine with xp and wouldnt hold u back ..

What graphics card would be best for a dual core amd athlon 64 x2, hp a1730n ?

Your computer has a 16x PCI-E expansion slot. So, just buy the fastest PCI-E video card that you can afford. I'd recommend at least a 320 MB 8800 GTS, if you're wanting very good performance.