I have installed an ATI Radeon 5750 1GB video card. I have hooked up the hdmi output to my magnivox 32 in lcd tv it worked for a while but i recently did a clean install of windows 7 professional reinstalled the drivers that came with the video card but they wouldnt install a message popped up saying drivers do not support installed GPU so I went online and downloaded the specific win 7 drivers they installed fine but i have no video out through the hdmi the tv shows a not supported format can anybody give me a heads up on what is going on