Originally Posted by unclewebb
As delivered from Intel, the Pentium G3258 is a 3.2 GHz processor and that's it. Their spec page does not call it a K series CPU and they don't mention that the multiplier is unlocked. The average Joe can buy this processor and run it as is at its default 3.2 GHz speed and at this speed, it does not use Intel Turbo Boost.
The overclocking part is more like a secret for enthusiasts. Intel might not want to admit that this CPU uses Intel Turbo Boost but all Intel CPUs that are running at a multiplier greater than the default multiplier are using Intel Turbo Boost internally. To test this, run RealTemp, put a load on your CPU and go into the Settings window and click on Disable Turbo. If your CPU was running at 4+ GHz and now it is only running at 3.2 GHz after you have disabled Turbo Boost within the processor then I guess that confirms that the CPU really is using Intel Turbo Boost when overclocking.
K series CPUs like the 4670K use Turbo Boost by default. Even if you are not overclocking one of these, when 1 core is active, it will turbo up to 3.8 GHz compared to its default speed of 3.4 GHz. With the Pentium, you can do this too. You just need to manually adjust the Turbo Boost multipliers in the bios or in software because by default, the G3258 only runs at 3.2 GHz.
This is so true, a funny little story about this happened to me recently.
I put a G3258 in my ASRock Z87 Extreme 6 board a few weeks ago. At that time the latest BIOS had "support for new 4th generation Intel processors", but nothing specific about the G3258. The PC booted and ran fine with the G3258. Since the G3258 "does not support Turbo", the Turbo Boost option was no longer displayed in the BIOS as it did when my 4670K was installed.
I then tried to OC the G3258 by changing the core multipliers, which I could do in the BIOS. But once I booted, every monitoring program I tried showed the G3258 at 3.2GHz maximum. The core multiplier settings in the BIOS remained at my higher setting (40) but the CPU was running at 3.2GHz. I noticed in Intel XTU that the Turbo option was listed, set to disabled, and could not be enabled. I discussed this in a thread in an ASRock forum, but the OP of the thread did not believe this problem was related to Turbo. I was skeptical.
Soon afterwards I noticed a beta BIOS for my board, with the description, Update C0 microcode to support Pentium Anniversary
So I flashed to the beta BIOS and guess what I found? The Turbo Boost option was displayed with the G3258 installed. After that, I set Turbo to enabled, and my multipliers set to 40 became a 4.0GHz OC when I booted. Isn't that amazing? Actually, not, as you described.
An official BIOS has since been released for this board, and the Turbo option remains available.
My question is, do other Z87 and Z97 boards that allow you to OC a G3258 also include the Turbo option in their BIOS' when one is installed? Or do some not display the Turbo option, but have it enabled secretly? How else can this be accomplished? Is this also part of the secret to non-Z OC?
Also, would changing the microcode (in the beta BIOS) cause Turbo to become active in this processor? Would that also cause the Turbo option to be displayed in the BIOS?