I have a visiontek 4870x2 and tried to install it but i couldn't get any picture through my monitor. Everything was hooked up and stufff but no picture. I tried DVI and HDMI, but nothing. WIth HDMI I just got a Blue screen and DVI a "No signal detected" But with my older 8800 GTX it worked fine. I don't think it's the video card, but maybe vista, because DVI doesn't seem to work either on my 8800 GTX ; I get no picture. I tried another LCD that works and got the same results.