Yeah, that's the board I have — GA-Z77X-UD5H-WB
as far as confirming:
Full Graphics QE/CI - Don't totally know how to confirm exactly. Not using on-board gfx. Radeon 7950 works out of the box and is able to run 2 monitors at full resolution. Also got a good Geekbench score on it.
Turbo boost - Working
XMP - Working
Sleep/wake without any problem - Working
USB3 - All USB ports are working and functioning as they should (USB2 and USB3)
Gigabit Ethernet - Only Intel is working. I installed the InstelMausiEthernet v2.4.0 driver with [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] and I have Ethernet upon wake. Have yet to confirm speeds, however. Atheros will just not seem to work for me.
Audio - Built in audio working, but I'm using a firewire audio interface (Saffire Pro 40) for my main audio, which is also working.
SATA - All ports working.
eSATA - Have not tested, don't need.
iMessage - Had to run iMessage fixer, still having some issues syncing messages from my iPhone X.
iCloud - works perfectly