driver for ati 3650hd

system config:
intel core 2 duo e6550;
intel g33fb motherboard;
sapphire hd 3650 graphics card(ati);
2 gb ram 667 mhz;
suse detected my graphics card as 3670hd i turned all 3d effects on and my system crashed
now plz tell me how can i remove the old driver and install one for my card and where can i find it