I suspect it isn't a video card problem, as has already been stated Poser doesn't use anything but the standard GDI functions and rendering functionality is a process that is dependent almost entirely on processor/memory usage. However, Stefan may well be correct about the memory problem. Even if there is only one stick, it's quite possible that there are faults at some of the higher (absolute) memory adresses, which you just don't see in normal use. Memeory testers should be fairly easy to come by. Bill