Hi, Reviving an old thread I found a few ways to accomplish this though have not been successful in finding a full solution but the trick is to slip an nvidia sli certificate into the acpi tables and then run modded hal drivers. In theory anyhow. I found that Phoenix tools utility was built for doing this if not for not being compatible with the crosshair iv formula bios. But there should be a way to extract the tables using mmtool and patch the acpi tables. Anyone want to try?