its in the M.I.T. Its called the system memory multiplier. There are only 4 options, Auto, 2.66, 3.33 and 4.0+. I just picked up an E5300 and the same board. I can get a stable 3.33Ghz. let me know where you end up. I've been tinkering all day. I cant get anything stable over 3.33.