If it does come down to flashing your bios DO NOT use the Asus Update utility from windows. Even the Asus representatives say it pretty much always borks your system.

I used this tool despite knowing it was a bad idea (I do that kinda thing often) It is possible to fry your bios for good and if your not lucky enough to have a removable bios chip your whole mobo will have to go.

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MOBO: Z77MX-QUO-AOS CPU: Core i7 3770K GPU: MSI N760 TF 2GD5/OC Case: Modded MacPro2,1
Memory: 32GB Corsair Vengeance (CMY32GX3M4A1600C9) Wifi: Airport Extreme bcm94321MCA BIOS: HermitCrab Labs H3A.816M
Monitor: AOC Q2963Pm 29" WFHD 2560x1080 21:9
Interests: KDE on Apple Darwin, Keeping it real with the command line, Helping those that help themselves