There have been "hacked drivers" in the past that enabled SLI on Intel motherboards, but unfortunately they tended to lag well behind Nvidia driver releases, and, being unofficial, there were always possible stability issues.The thing that surprises me is that someone hasn't hacked around what has be to a pci-e device id check. And on the same token, except for a driver check, I'm pretty confident that crossfire would also work on the nvida chipsets.