I've got an hpCompaq d530SFF (it's a small box) with a low-profile Silicon Image, Sil 164 Carrera ADD Card for the Intel 845G chipset plugged in to the only AGP slot in the box. I think I can replace it with a card that is more suited to CAD and that has at least 128Mb of memory. I don't know a lot about this stuff, but I'm guessing the Sil 164 card just provides a DVI output and not any graphics processing? If that is the case, if I replace the board, I'm assuming I would have to disable the mobo graphics processor? Any suggestions for a replacement board? (BTW, it was suggested that the nvidia TI4600 was a good choice, but I think it is discontinued and it wouldn't fit in the box anyway.) Thanks!