The mulitiplier is locked at 9, thou you can lower it. That q9650 should go to 4.0GHz with no problem on that M/BD.
I do think your memory will hold you back. I use OCZ PC3 16000 (2000) 2 X 2G memory linked and synced so when I change ny FSB it will change the memory as well @ 1:1 ratio. (actual is 1:2)
That guide I linked you to tells you how to OC with your M/BD! It is the same guide I used in 2008 to OC mine. Read it. Try it out and if you are still having problems I will try to help you.
I ask this of you because you would at least know what I would be talking about and hopefully why. Good for you and me.