Hmmm. Indeed, I am running a 3640, but I'll have to check to see what version of it. This is temporary, as I plan to put in an accelerator board when I can find one. The only other "weirdness" I'm having is that VistaPro 3.0 will absolutely not run with the CV 64/3D card in my machine, even though I am not trying to mode-promote the program and am just trying to get it up and running on the native display. (I understand VistaPro and RTG do not mix.) The program works fine (like the Buddha!) when the CV 64/3D is pulled from the machine. Otherwise, no issues whatsoever with the graphic card.