@greg.m,
thank for posting your oc results. As I see do you have a Q9650 and a ATI 4820X2 video card.
Many friends of mine told me that the X48 chip plus a quad needs a hell of a lot voltage to the nb being prime95 or LinX 0.5.8 stable.
This "hell of a lot voltage" should be about 1.5v and more.
Would you say that´s true?
How much voltage did you take on the NB to get your oc stable?