Had my Gigabyte GA-Q77M-D2H board fail on me a few weeks ago. (no display/post, no USB, but power light showed on). Got what I believe is a new one back from Gigabyte (had a different MAC address at least) and this one had the F2 BIOS.
New section for Windows 8, CSM, and Secure Boot. Had to fool around with the settings to get it to boot.
Recommend options for the new F2 bios:
Intel Virtualization Technology: enabled
VT-d: disabled (at least this causes OS X boot to hang with my setup)
OS Type: Windows 8
CSM: Never
Other PCI Dev ROM Priority: UEFI First (if you are booting legacy such as with Chimera, pick Legacy)
Secure Boot: Disabled
SATA: AHCI
My setup is booting UEFI with Clover, though I had to update to the latest version (v. 1136) to make it work with this F2 BIOS. I am also booting to a Fusion setup as well. All works well now.