I have found this function in the BOIS in both my Vail x64 machine and Windows 7 x64 machine. Brief reading suggests this should enable better 64 bit support however on both machines the driver won't install and I get a driver error for PCI Simple Communications Controller.
Does anyone know why the driver won't load or whether this will make any difference to performance on either machine?
Windows 7: 16 GB Ram, SATA II HD on AHCI, Intel DG45ID mobo, HPET enabled
Vail: 6 GB Ram, 2 x SATA II on AHCI Native SATA, Gigabyte P965 mobo, HPET set to 64 bit.