my nvidia geforce 8400 with 512 memory problem with my game. whenever i play cross fire or any other game it destroy graphics or my computer give blue error and reset. i m using dell dimension 8300. it has ddr 1 ram and agp port. i m using pci port for card and geforce 8400 is pci express card. is it compatibility issue or card issue plz tell me so i take some decision to change my pc or change my card.