I want to install a new video card..my old one is a intel AGP 8 mg and the new one is a ATI AGP 32 mg...This is what i did...unplugged the old card inserted the new one...turn on computer,and DOS came up, 2 pages and then my monitor went on stand by mode...What happened...So i put the old one back and it ok now....should i uninstall the software first??? help Rick