My motherboard is ASUS p9x79 PRO
Hi had this with cubase 7.06. I updated my bios on the same motherboard (the normal one not the pro version).
Cubase would behave very bad and crashing all the time.
I reinstalled from scratch, this made it stable less or more because now I had dropouts.
Now when you update your bios all settings are returned to default, however I didn't hardcopy any bios settings.
After fiddling around with memory, clocking, power options and disabling HT, I managed to get it stable again, but this time with the newest bios and windows 8.1.
Still having little troubles like loading an old project, otherwise it seems stable again.
It seems that bios settings cab heavily scramble your system's stability,
Hope this can help...
Win8.1, 3930K@3.2Ghz, 32GB, Cubase 7.5 & artist 7.5, wavelab 8 elements, HSO, RND Portico 5033, UR824+MR816X+Focusrite pro 26 IO, CC121, Cubase IC pro, Halion 5, VG2, Arturia AF, TRacks CS grand + all custom elements, BFD3, Amplitube 3 (fender, orange, SVX collections, slash), HSO library, Fender Jazz basses, tube amps and 12 inchers!