Not sure how many of these MB's are still out there, so just to give this "old" thread some new life - I upgraded the BIOS to 6/15/2010 and installed a new i7 990x.
So far so good - 4.0 (30x133) @ 1.28v

I hope that my old 920 D0 was a dog and not this board - I never got that chip stable over 3.8 ........