I just found out about these very cheap bridge cards. http://www.guru3d.com/newsitem.php?id=2668 It is possible to run an AGP GeForce 6800 Ultra as a QuadroFX 4000 using Rivatuner. Would a bridge card like that allow the same thing on a system with a PCI-E motherboard? If so, without a serious performance hit? Physical installation would be a problem, but not insurmountable. Am tempted to try this out.