I am one of the people who bought an Ultra-D board for use with my X800XL. Now I can see a use for the second PCI-E slot. This is getting interesting. Early word from ATI is that they expect the Crossfire solution to work in "other" chipsets with 2 PCI-E slots. There needs to be 8x electrical PCI-E at least in the physical 16x slots. Since this is a video card/driver and not a motherboard implementation, the external dongle application should be motherboard independent. I am hoping to see this turn out for the better. It would be sooo nice to only have to purchase one more thing to get this working.