Poser doesn't, it seems, use the built-in graphics functions of the hardware. My own experience suggests that it is still worth using a graphics card with plenty of its own RAM. Last summer I replaced an old 32K-RAM card with a 128K-RAM card. Call is 1999-tech replaced by 2003-tech. I felt there was a definite improvement in system stability, but was that the extra RAM, or more recent drivers? I changed as much because my old card didn't get supported by current DirectX as because of any actual problems, and was pleasantly surprised by the effect on Poser.