Hi Everyone, Great forum you've got here! I'm fit to throw a wobbly. I've got a Compaq Deskpro PIII 450. Into this okay-ish machine I am trying to install an ATI Radeon 9200 ( 128mb. ) I have to actually get things underway with a 4 meg. card, and when I stick in the ATI Radeon the machine finds it, and asks if it should go on the net to look for drivers. I tend to skip this and install the drivers which I downloaded from ATI. All well, can see the ATI Radeon in Hardware manager ... no conflicts, working fine. I then plug the monitor from the 4 meg. into the ATI and get a black screen. The bios upgrade is the only thing I haven't tried ... the AGP port in the Compaq is 1x 3.3v., so that seems to be withing spec. Everything seems to be 'right'. I gave the machine to a guy who tested the card in another machine and said it worked fine. His verdict: the Compaq PIII is incompatible. Seems strange to me ... surely if the machine finds / installs it ... you know? Any advice much appreciated. Regards, Anthony.