The 82945G/82945GC GMCH IGD is Not capable of operating in parallel with an external PCI Express graphics device. The GMCH can, however, work in conjunction with a PCI graphics adapter. IntelR Extended Desktop and Dual Display Zoom feature is supported with the 82945G GMCH only. IntelR Dual Display Clone and Dual Display Twin are supported with the 82945G, 82945GC, and the 82945GZ.