Of course we could always try and ask Asus support..
Good one don't you think They'd probably tell us to check the manual or something, based on my previous experiences with them
Yeh, Asus support is so bad. Normally, it goes like this: I ask a question. Then, support guy says "Hmm, that's interesting. Let me type that into Google and see what we get." One time, the support guy "knew" the answer. I asked "What happens if I lower the FSB?". Support guy confidently replies, "Then the processor will run at the same GHZ speed but with a lower FSB". I think, to get any real help, we need to bypass the support guys and communicate directly with the engineers.

Tested yesterday the board with 2 qx9775 and the last bios available
Thanks giorgioprimo. Were you able to adjust the multiplier (upwards) for Qx9775?