Further to my last post, I've tried out my Z3 with a friend's newer Geforce 5600 card, and it displays the same symptoms as mine, i.e. works DVI only works at 640x480 or 720x480 and no higher. This leads me to conclude that either my projector's HDMI input is broken or my cable isn't up to scratch. Obviously, I'm loathe to shell out more on another DVI->HDMI cable if not required, so wondered if people who have got a similar combo working. Is there a maximum distance on these cables? I have a 5m DVI->HDMI that claims to be rated for 5Gbps, which is AFAIK the maximum supported by HDMI anyway. Another plan, if anyone in Coventry or the West Midlands is willing and has a PC DVI -> HDMI combination working (whether Z3 or not!) and wouldn't mind me bringing round my cable and projector to see if either or both is faulty, that would be even better, as that way I can try out my cable with their set-up and my projector with their cable. But, obviously that's hassle for someone too!