darkassain

allright what is the model of your computer??
what video card???
unnistall the old video drivers
plug in the video card

go to the bios (when you first turn on the computer you should see something like BIOS setup or BIOS setting) there should be a setting to disable the IGP and to enable the one in you PCI-e
now you should be able to log in

BTW are you sure you have adaquete power for your card??