Originally Posted by deafboy
I can't touch the multi regardless...whether it's on or off. But if speed step is off, turbo is no longer an option. Turn speedstep on and turbo shows up.
I saw this:
So it turns out disabling C-States in the BIOS eliminates the 22x and 23x multipliers (because "inactive cores" only exist in the C3 and C6 states, and the 22x and 23x multipliers only kick in when one or more cores are inactive).
I'm now at 21x191 for 4 GHz, which puts a lot less stress on the IOH and uncore
So disabling c-states might get you one more mult but not the rest. Weird though, there should be a turbo setting too apparantly.
Also found this:
The short answer is that the multiplier for the X5660 processor is locked at 21 but, with TURBO BOOST, the multiplier can increase by either 2 or 3.
The long answer is that turbo boost will change the multiplier for one or more cores in a complicated schedule described by shorthand expression, 2/2/2/2/3/3/. The meaning is described in the following figure where the term "bin" refers to increments of the base-clock frequency. For example, if BCLK=133 MHz, 2 bins = increment of 266 MHz. Or another way of saying this is that the multiplier for some cores can be raised from the nominal value, e.g.,21 to 23,24 or whatever. On the X5660, the multiplier for all six cores could be raised to 23 in some circumstances. In other circumstances, however, turbo boost will only raise the multiplier for 1 or 2 cores to 24 (and keep the other cores running with a multiplier of 21). The main determinants of the exact configuration include the work load and the cpu core temperatures.
Add in the x5667 specs:
Frequency 3067 MHz
Turbo frequency 3467 MHz (1 or 2 cores)
3333 MHz (3 or 4 cores)
Bus speed 6.4 GT/s QPI (3200 MHz)
Clock multiplier 23
it looks like 25 will be your max mult even if you disable c-states, the question is now how to get there.Edited by stren - 6/28/13 at 8:08pm