It took 1.39 volts to get to 4050MHz but to go higher Prime stable required ridiculously high voltages. I dont mind pushing it but when running LinPack the temperatures spiked to 110 degrees right off the bat with the volts at the 1.55 I used to run the E8400 up to 4.5GHz. So knowing where my maximum speed was, I decided to see what kind of FSB I could get from the board and E7200. I dropped the multiplier down to 7 and started at 525FSB since this was the limit on the E8400. No problem! Moving in 5MHz increments I finally reached that wall at 545FSB. At this point it was time to start upping the multiplier to find the best mix of FSB and maximum speed that the E7200 would run at. 540 x 7 is the final overclock for this chip. Not quite the 2.0GHz worth of overclock I had originally thought possible but you gotta think, 1.55GHz worth of performance gained with a little work ain't too shabby.