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6850k core clocks weirdness

elkido122

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i am using afterburner to show all my cores clocks on all cores. i noticed in some multi core games that i play all cores are only boosting to a max or 3699 mhz and not 3800mhz. i also noticed that some of those cores fluctuate and run at 3499 instead of 3699 sometimes not all the time. what could be causing this kind of weirdness to happen. i went through my windows power settings all seem fine. any help to make all cores run up to the 3800 would be appreciated. just weird it did not seem normal to me. any help appreciated.
 
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Overclock them yourself, It's Turbo boost doing its own thing. It will only boost the cores that are needed for the job. The more cores needed - the less turbo frequency is.
 
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i am using afterburner to show all my cores clocks on all cores. i noticed in some multi core games that i play all cores are only boosting to a max or 3699 mhz and not 3800mhz. i also noticed that some of those cores fluctuate and run at 3499 instead of 3699 sometimes not all the time. what could be causing this kind of weirdness to happen. i went through my windows power settings all seem fine. any help to make all cores run up to the 3800 would be appreciated. just weird it did not seem normal to me. any help appreciated.

Usually, when single thread is used, it'll boost to its max. When 2 are used, it'll run somewhere half way between base and max boost. And when all cores run at max, it'll run at base.

What you can do is enable "Enhanced multi threading" or something like that. This will force CPU to always run at max boost speed on all cores no matter the load. With this, it should run at 3.8 GHz at all times when under load, be it single core or all cores. Check your BIOS.
 

elkido122

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So are you guys saying the behavior I'm seeing is normal? I did an encode on handbrake and all cores only ran at 3.5 GHz... Kinda was weird
 
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So are you guys saying the behavior I'm seeing is normal? I did an encode on handbrake and all cores only ran at 3.5 GHz... Kinda was weird
Absolutely normal, it's working as intended :)
 

elkido122

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so there was nothing wrong with the cores running at 3.5 on handbrake? thats below the base clock on a cpu intensive program..
 
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Max boost clock is only for one core. If you want all the cores to run at 3.8 GHz, you have to OC the CPU yourself.

 

elkido122

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they dont all need to run at 3.8, im saying they all run at 3.7 in games for the most part, i opened handbrake and did an encode, 4 of the cores ran at 3500 and 2 were at 3700. seems not normal to me? idk

hopefully that clears some confusion
 
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What board what are you using? Sounds like you are hitting a temp or power limit.

As far as I know that chip should be running at 3.8GHz all core turbo and the single core turbo is 4.0Ghz. Also make sure you have the turbo driver installed.
 

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Overclock them yourself, It's Turbo boost doing its own thing. It will only boost the cores that are needed for the job. The more cores needed - the less turbo frequency is.

Absolutely normal, it's working as intended :)

These 2 are correct, software will only use what it needs according to bios and os power option limits.

@elkido122, you are chasing a problem that doesn't exist. Disable turbo core functions and other power saving features in the bios and OS and oc the cpu manually or just leave it alone and be content you don't have instability issues.

/thread
 
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You can do per core overclock. Choose one of your faster/cooler cores and overclock that one specifically to say 4.3GHz. The rest can remain the same.
 
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