is it possible to disable turbo boost?

No. Its part of the internal design and circuitry of the intel processors.. it CANNOT be disabled.

You should of at least searched prior to all caps.

Quote from Intel:
"How is Intel Turbo Boost Technology enabled or disabled?
Intel Turbo Boost Technology is usually enabled by default by a switch in the bios where you can either enable or disable operation."

http://www.intel.com/support/processors/sb/cs-029908.htm

As I said... (macs) it CANNOT be disabled.. BIOS, Yes.. I meant to add PC Bios.. sorry 🙂

But as far as Macs are concerned, unless you have reFIT or some way of getting into the EFIshell, there is no way on a mac to disable it.. Using cpupalette, you can only disable cores, but not turbo boost.

Again, PC wins this one... Now, when the PC retires the bios and goes to EFI, that will be interesting to see how to disable turbo boost.

But as it stands, all Macs that have EFI can't disable the turbo boost.

Sorry man. You never said anything about Mac's. You said "Its part of the internal design and circuitry of the intel processors". That was inaccurate as BIOS can change it. Just not in Mac's without some emulation layer. It is all technically feasible but is it worth the effort?

A micro kernel, a ROM, a driver, they all can patch, change, and correct or overlay.

HT is usually what people ask to disable, not TB.

And you both sounds to me want to say the same thing, it is part of the processor hardware and controlled or tweaked by over-clockers a bit, but outside of the realm on a Mac. Voltage, ratios, everything is LOCKED down and locked out.

And if the software has to be that fine tuned, then a Mac with its UEFI is NOT what you want to go with, better off with a workstation that has an accible ROM (and UEFI is or can be just not the proprietary version).

I need deterministic results

What are you doing about processor caches? What is already in the cache will also influence your result.

I think you should arm-wave the entire subject and just run your benchmark multiple times and average the results.

You may get a better answer by going to a different forum for that specific question as you would need to hack the EFI or get some BIOS emulation going. This post will be deleted in 3.2.1...

I think not.. its NOT worth it at all on a mac.