You are reading my mind with getting away from the 975x. That lower 400's FSB limit these are supposed to have kinda spoils the party for me. I was testing out 3.9 GHz now that I know my issues really probably are the 975, and sure enough, lock up city, turn off city, Orthos crash too. I'm kinda getting lowered gains for the amount of more voltage put into this thing to make it sort of work. Right now I backed it down to 417/3.75GHz and am testing it here, seems like a decent speed that it might like from what I've been seeing so far. Sad to say, but it might be time to upgrade, I hope that Coollaboratory LM TIM didnt turn into a rock like it's rumored to. That stuff definately helps with heat transfer at highly elevated thermal output levels (like a B chip) compared to the best application of AS5 and lapping that I could do. So now I'll have 2 XBX2's on the shelf if I do upgrade (dont ask how I got the other one ). I'm wondering when this upgrade cycle might end...you know when the 45 nm CPU's are out it starts all over again