Same MOBO with BIOS 0906, mine is on its' way to ASUS after a week. In my case it went from working great to progressively BAD with sudden and totally unpredictable 'Shutdowns' (Boot Loop, Post Loops, you name it). On other forums I've seen that happen; FIX = RMA. BTW - ASUS's stock is out, so forget bothering with Cross Ship (RMA)
; expedited RMA/Exchange with VISA hold.
Never, ever, e-v-e-r, never use anything but ASUS EZ Flash 2 + Flash Drive FAT32.
I haven't tried to recover an X79 BIOS, thankfully, but you can try to insert the ASUS's DVD (the one that came in the box) and boot off it. The SABERX79.ROM file on the DVD is used to recover the BIOS.
In addition, you can use the ASUS Flashback (BIOS on USB Flash drive); see -> http://rog.asus.com/forum/showthread.php?1142-How-to-use-ASUS-ROG-USB-BIOS-Flashback
; if you noticed the 'WHITE' USB next to the odd looking button, that's the USB port to use -- rename the BIOS file to SABERX79.ROM