i7 8700K Core Speed Fluctuating

Spyromancer

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Feb 2, 2015
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Hello there, as the title suggests I'm having a problem with my cpu core speed being all over the place. And from what I've read it is normal for this to happen during idle. In my particular case I am attempting to overclock to 4.8ghz.(please note I am quite new to this) I've been manually dropping the Core voltage by 0.10 volts and running stress tests (prime 95, AIDA64) to check for stability before dropping the voltage down more. I'm having no issues with temps and the highest I have seen any core get is 71c and that was only when I first started AIDA64 but it quickly fell down to an average of around 63c (during tests). However the issue I am having is that my Core Speed and multiplier after several minutes will drop to as low as 3200ghz/x32. I have tried several tips that I found with google searches, but to no avail. I have turned off Intel speed step technology while testing and it did not change anything. Multi core enhancement is off as well. I've also tried different LLC settings in my bios and I'm not sure it changed anything and I don't want to mess with a setting I don't fully understand.(<this was also a supposed fix I found on google.) Another thing to note is the my VID in core temp seems to be unusually high. Could this be caused by not enough core voltage? Does this just mean my overclock is just not stable and nowhere close to it? Other then the fluctuating core speed I have not noticed any other problems with my current overclock.

Sorry for the unorganized and all over the place question/information I just don't really fully grasp all of this Overclocking information yet.

Any help would be amazing! Sorry If I have not provided enough info, just ask if there is something I haven't listed that is important to know in this situation.

PC Specs:
CPU :i7 8700K (Cooled with a corsair h100iv2
Motherboard: ASUS Rog Strix z370-e gaming
Memory: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3200MHz
GPU: (Temporary) MSI GTX 970
Case: NZXT S340 Elite
Windows 10 pro installed on a 250GB Samsung ssd

Thanks!
 
Solution


If this happens every time it means that your cores reach a temp that is considered too high so they clock down to keep the temp in safe regions.
Looks like a setting from your mobo since intel (the chip itself) only does this at ~100°C


If this happens every time it means that your cores reach a temp that is considered too high so they clock down to keep the temp in safe regions.
Looks like a setting from your mobo since intel (the chip itself) only does this at ~100°C
 
Solution