My Gigabyte GA-Z77X-UD5H (BIOS F16G) motherboard works fine in Windows 8.1 Pro in UEFI & Secure Boot Mode.
Does this motherboard work in Windows 10 in UEFI & Secure Boot Mode?
It's not on Gigabytes compatibility list but the Windows 10 Compatibility Advisor states my PC is compatible with Windows 10.