That board has a 95W TDP limit. I would try an E7500 raised from 11x266 fsb to 11X 333fsb for 3.67GHz
or E7600 11.5x333= 3.8GHz. if you can't do this in BIOS there's a tapemod also.
The fsb on that board has a reputation for not going much over 343fsb, and the 95W limit keep most of the faster quads out anyway.