Hi Serg008, Thanks, I tried Gigabyte Z68A-D3H-B3 (rev.1.0) Beta UEFI BIOS U1d mod in both Var 1 and Var 2 with the same error result. Daz's Win Loader shows this BIOS as ALASKA 2.1 and SLIC Toolkit shows the normal GBT 2.1. SLIC Toolkit shows != error for X&RSDT, and SLIC Status: Invalidated. Would you like me to run a RW ACPI dump and upload back here? Cheers, Andrew