I've got a 4000 (OS 3.9) with a warp engine and 96mbs of ram and am running a cybervision 3-d using cybergraphics v3 software and it is working fine with my KDS 15 LCD monitor, but I have to run it at 640x480 (24bit) because the monitor won't sync to the frequencies that the board generates for 800x600, etc. So our systems seem pretty similar. I wonder if the problem might be with some other piece of software you have? Jule