For those that have their IMC/northbridge bumped in speed, what kind of voltages are you guys running your IMC/northbridge? I just can't seem to get mine stable even 1MHz past 200MHz. Did you bump your HT voltage at all? I seem to need a lot of voltage compared to most of you to stay stable at 2.8GHz. Seems like a good deal of you are at 3GHz+ with less voltage then I am running at 2.8GHz. Not sure if my chip is to blame, my SB600, or me. My guess is a little of all three.