ok so im a gamer and recently i bought a geforce 8400 gs PCI ddr2 and it wouldnt work so i called the pny technology and they said thats why it doesnt work because they sent out defective graphic cards by mistake and i just so happen to buy one but now im looking for a good gaming graphic card from $30 too $60 dollars and the technical person said i could buy a pretty decent one around that price range so i need help choosing one because i was looking thru all of the graphic cards online but theres alot of stuff i dont get because im not a computer person but i have emachines windows vista n my model is ET1641-02w and he said i should look into this graphic card -XFX PVT86SYHLG GeForce 8400 GS Video Card - 512MB DDR2, PCI Express 2.0, DVI, VGA, HDTV but when i scrolled down it says 64 bit somethin and i think my computer is 36 bit or whatever over bits there is besides 64 im the lower one i think lol but if someone could look for info bout my comp n tell me the best graphic card for a cheap price it wuld be much appreciated thank you.