jiggleyworm

I have a 9800 GX2, and i installed the new nvidia drivers 175.16, and it prompted me to restart, so i did. i booted into windows and before i could start up an application, i got BSOD. and now, i can't even get into my bios. When i start the computer, i get the normal beep, but nothing comes up on the screen. i tried using different memory, and a different graphics card. Both of which i know work. what is wrong?