Help!!!

I have a Radeon card and it is making all of my games crash. I am using the 7075 drivers and Direct X 8a. I have 256 RAM and an AMD 1Ghz processor and Im using the ASUS K7M mobo. I have also flashed my bios on my mobo. Nothing I do seems to work. No matter what game I play, my system crashes. I think it is a problem with Direct 3D or Direct Draw but Im not sure. Does anyone have any idea on what I could do do resolve this issue.