@AllanFly Please use RW Everything to see the existence of SLIC; in pure UEFI mode SLIC Toolkit can't detect ACPI tables.
As always thank you Serg but same error with Qflash embebbed in efi i receive INVALID BIOS FILE, and with dos utility : INVALID BIOS FILE! DOS/32A warning (9003): real mode interrupt vector had been modified INT 10h UPDATE! flashed with your utility included and now flashed ok from DOS! so i think is not the same utility included in the gigabyte release... THANK YOU SERG as always!!