Turbo working properly on my i7-4820k?

[Dave3000]

I recently bought an i7-4820k. I noticed that it's not turbo boosting unless one core is active. For example it stays at 3.7GHz during Prime95 or Cinebench CPU test. If I disable 3 cores in the BIOS, then that's the only time it's getting 3.9GHz turbo. 2 cores disabled in the BIOS gets me no turbo boost. The turbo boost is the same as the base clock from 2-4 cores active or enabled. So it's like this on my system:

1 core 3.9GHz
2 cores 3.7GHz
3 cores 3.7GHz
4 cores 3.7GHz

I checked Wiki and it said that this CPU does 3.8 when 3 and 4 cores are active and 3.9 when 1 and 2 cores are active. Is Wiki wrong or is my CPU defective?

 

[Dave3000]

I also got a referencing error about a csx.exe during Windows 7 shutdown when this chip was installed. Shutdown was too quick for me to read the whole error message inside the box. This never happened on my previous CPU. I didn't reinstall Windows after install my new CPU and many things in the Device Manager said base devices and I had to install the latest chipset drivers to get Windows to recognize my 4820k properly. Should I have reinstalled Windows when going from SB-E to IB-E CPU even on the same motherboard? I only have one problem ever since installing my 4820k, the referencing error for csx.exe that happened once during shutdown. I don't know if turbo boost is working like it should but I find it strange that it only kicks in for 1 core active and 2-4 cores active are base clock speeds. Do I just say to the customer service worker that it was causing stability issues with my PC if I decide to return it?

 

[Dave3000]

I was wrong about the turbo bins Wiki was showing for the 4820k. Wiki is showing 1/?/?/2. But still according to what it says in Wiki, my 4820k should turbo to 3.8GHz when 4 cores are active and my 4820k is actually running at 3.7GHz when all cores are active and a 2 multiplier jump when only 1 core active.

 

[Dave3000]

Here's the Wiki about the 4820k's turbo. http://en.wikipedia.org/wiki/List_of_Intel_Core_i7_microprocessors

 

[Dave3000]

Well, I was running Prime 95's Blend test and within 20 seconds my PC froze up and I had to press the power button on my case to shutdown. It froze twice in this test within 20 seconds. Temps never exceeded 63C when running Prime's Small FFT test faster 2 1/2 hours so my CPU it's not an overheating problem. But now I was running the blend test a 3rd time and it was running fine until I stopped it. So I'm just going to return the 4820k tomorrow and tell them that I"m having stability issues with and it's the only thing that I added to my PC since these issues have occurred. Thank goodness they have a 15-day return policy on CPU's.

 

[Dave3000]

I now don't think that the CPU caused Prime 95 blend test to freeze. I reinstalled my old CPU and ran CPU-Z and found out that my RAM was set to 9-9-9-9-3T instead of the stock 9-9-9-24-2T. At some point when I had the 4820k installed, the BIOS somehow changed these settings as I didn't change them when I had the 4820k installed. This is weird.

 

[crashtech]

It's K chip, so why don't you just set the multipliers where you want them, and be done?

 

[Justinbaileyman]

Right!! Thats what Im saying too just set it and forget it LOL..
I doubt there is anyting wrong with your 4820K you just dont know what your doing yet..
Dont give up yet keep at it and you'll get to where you wanna be..