You will have to disable Intels power management. Intel has what they call Enhanced EIST to lower the performance when the CPU is being under used. Its just Intel's way of doing Cool'n'Quiet.
That will make it run hotter, right?
Whats the max temps I'd want to run the E8500 at? its around 40 - 45 idle right now, running at 2 - 2.5 ghz.
Haven't run it much under load yet.