i5 4690k clock speed drops to 800mhz for a few seconds then goes back up

Eyesthetics · Apr 16, 2015

Guys please i need help, I already asked this a few pages back but i got ignored, so my i5 4690k is now stable at 4.6Ghz with 1.3V, Ring bus is 4.1Ghz at 1.2V, i already ran aida64 overnight and there was no bsod freezing or anything it was all stable, but when i saw the clock graph, it was like a hill, up down up down up down. i also notice this when my cpu is under a heavy load when playing cpu intensive games like cryhsis 3 or watch dogs, the clock speed suddenly drops to 800mhz for like 5 seconds then goes back up to 4.6Ghz, idk what causes this but for sure its not thermal throttling as my temps only max out at 80c with a corsair h100i. I already tried turning off intel speedstep but to no avail. i have scoured the internet but seems like im the only one who has this problem. what do ? pls guys don't ignore me. im at page 5 on google search |i5 4690k speed drops to 800mhz" and still no answer .

CrimsonLuke · Apr 16, 2015

It probably is thermal throttling as it typically kicks in at around 75-80C

Eyesthetics · Apr 16, 2015

there is no thermal throttling whatsoever according to hwinfo and aida64 graph. besides thermal throttling only kicks in at 100c

Eyesthetics · Apr 16, 2015

and why would it get thermal throttled, im using a corsair h100i

Lag · Apr 16, 2015

Eyesthetics :

Did you forget to disable cool n quiet feature? thats whats its called on Asus Motherboards at least. Its a feature to save power when the cpu doesnt need to run at full speed

This can be disabled in BIOS

Shneiky · Apr 16, 2015

Donwload CoreTemp and RealTemp and post the exact temperatures that you get. Because it is most likely a thermal issue and you are strongly overrating the H100i. Haswell chips have higher thermal density than Ivy or Sandy and the best coolers for Haswell are not the ones that can dissipate large amounts of heat, but the ones that dissipate heat faster.

Eyesthetics · Apr 16, 2015

I'm not using an asus board, i have asrock. I monitor my temps and they never pass 81 degrees.

Eyesthetics · Apr 16, 2015

these are the pictures from occt graph during stress testing, as you can see, the temps and clocks fluctuate a lot, 800mhz then 4.6Ghz, and there's no thermal throttling as the cpu barely hits 80c

idk how to embed a pic here so imma just give you guys the link : http://share.pho.to/9Fo0m

Eyesthetics · Apr 16, 2015

i already have tried turning off all power-saving features, cstates, windows power saving mode, intelspeedstep, so on. but to no avail. weirdly though if i disable thermal throttling. the cpu goes down to 3.5Ghz instead of 800mhz if its turned on...

Lag · Apr 16, 2015

Eyesthetics :

hmm, it should be the reverse. That is definitely wierd.

Eyesthetics · Apr 16, 2015

weird indeed, like i said. its def not thermal throttling, if it was, the cpu would have had to be 100c . whereas mine barely hit 80c

Lag · Apr 16, 2015

Eyesthetics :

80c is not an ideal temperature for long term use doh, as this is most likely to cause thermal damage down the road. ideal operating temperature is between 70-75 degrees for long term use, I would suggest to lower your clocks down to 4,4-4.5 and test that.

Eyesthetics · Apr 16, 2015

They're stress testing temps, when gaming they're 65-72

Lag · Apr 16, 2015

Eyesthetics :

hmm, then it could be that the chip is simply not stable at those clocks, as it isn't always temperature that determines the stability of the OC.

Niteowl71 · Jun 30, 2015

Mine does the same thing thats normal its just going into low power state to keep temps and voltage lower when your not needing the speed. Its called speed step in bios if you want to run it at full speed even when your not using the cpu for things like surfing the internet etc then you can disable speed step to keep it at 4.5 ghz or whatever you set it to 24/7.

convertedconsolegamer_92 · Jun 30, 2015

This happened to me when I stress tested using Intel Burn Test. I had to disable an option called APM (Advanced Power Management) in my Bios and that stopped the CPU from throttling. This was a common problem on AMD FX CPUs a few years ago before motherboard manufacturers started to add disable options in the BIOS. Since you have an Intel I'm not sure if there is an APM mode or not, or maybe it's called something different.

Also when stress testing turn off any power saving features in your BIOS. Also you are right this is not being caused by thermal throttling because your CPU is not getting hot enough for that. I hope what I said helps but as I said you being on the Intel platform I'm sure the option probably won't be called APM.

Edit: I also want to add that as long as a CPU throttles under heavy load during stress testing that pretty much means that overclock is not truly stable. The test needs to be done at the steady set frequency the whole duration. I did a little more research. Apparently Intel boards do have APM modes. Disable that in your BIOS.

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i5 4690k clock speed drops to 800mhz for a few seconds then goes back up

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