Well I dove into the BIOS and tried a few things that I recognized and a few I made and educated guess. Vcore isn't called Vcore, confusing.
So I have a stable clock (though modest) at 3330.8MHz using the following;
Base Clock of 166MHz
Multiplier of 20
Vcore of 1.300V (which under load rises to 1.328)
Turbo is OFF
Are there any other settings I can adjust, QPI, RAM timings or voltage to get a more efficient OC.
At the moment I'm running Prime95 and at max load it's averaging 70 degrees after 10 minutes, it hasn't gone above 74.
When I stop Prime95 the multiplier drops to 12, is this just power saving? is it healthy for the CPU to be jumping around with the multiplier like that?