I7 8700k temperature jumping

Good evening folks.
I am experiencing a strange problem with my new I7 8700k.
With default BIOS settings(disabled core enhancement) my CPUs temperature under load( world community grid for example) is jumping from ~75 degrees to 40 for a second and then raises back all the time causing fans to change speed and go up and down. Thermal paste is present in a fair amount and doesn't seem to be the problem as well as the cooler(dark rock pro 3).
Please, help me with an advice.
Build is
Case - corsair 760T
Mobo: ASUS ROG MAXIMUS X HERO
CPU - core I7 8700k
GPU - 1080Ti
RAM - 32 GB corsair vengeance (2 x16 sticks)
PSU - Cooler Master V850
Lots of fans present in the case, really good airflow.
Please assist.
Reply to stas1990
15 answers Last reply
More about 8700k temperature jumping
  1. Check your bios settings and voltages. Are you overclocking? Check if your board is pushing +volts on the cores. You have to be under constant load to check if your cpu is performing the way it is meant to, like running a stress test. Spikes are normal by overall and your cpu is hitting high temps by rule. Many are using liquid cooling to overclock them. Any performance issues? Also, what do you mean " a fair ammount of thermal paste". You are not supposed to cover the cpu with paste, i guess you know that already.

    P.S.: You may want to have a look at this. Check if your motherboard manufacturer has covered the issue with a bios update.
    http://www.tomshardware.co.uk/answers/id-3568346/temperatures-spiking-80c-higher-randomly-intel-8700.html
    Reply to Tolis_GR
  2. Tolis_GR said:
    Check your bios settings and voltages. Are you overclocking? Check if your board is pushing +volts on the cores. You have to be under constant load to check if your cpu is performing the way it is meant to, like running a stress test. Spikes are normal by overall and your cpu is hitting high temps by rule. Many are using liquid cooling to overclock them. Any performance issues? Also, what do you mean " a fair ammount of thermal paste". You are not supposed to cover the cpu with paste, i guess you know that already.

    P.S.: You may want to have a look at this. Check if your motherboard manufacturer has covered the issue with a bios update.
    http://www.tomshardware.co.uk/answers/id-3568346/temperatures-spiking-80c-higher-randomly-intel-8700.html


    No, i am not OCing my PC, only thing i did is increase memory frequency from 2133 to 3000 Mhz..
    Under AIDA64 for example i still have spikes! Though cpu is dropping-raising from 60 to 80+ and backwards.
    I applied the paste to my cooler, not too much not too little, checked the amount after by reseating it - its good, the contact is fine.
    I updated bios to the latest version - no changes so far, updated around a week ago.
    Reply to stas1990
  3. they have a new version for the BIOS for your board just yesterday.

    Version 1003 2018/01/028.23 MBytes
    ROG MAXIMUS X HERO BIOS 1003
    Improve system performance.
    Improved DRAM compatibility


    Also disable MCE to lower down the amount of voltage output to all your cores. asus probably assumed all their consumers will be buying high end coolers and leaving this setting ON for the unsuspecting builder :D your cooler may not be able to handle an all sync setting for 6 cores. of course you may leave it enabled if you see temps stabilizing.
    Reply to marksavio
  4. marksavio said:
    they have a new version for the BIOS for your board just yesterday.

    Version 1003 2018/01/028.23 MBytes
    ROG MAXIMUS X HERO BIOS 1003
    Improve system performance.
    Improved DRAM compatibility


    Also disable MCE to lower down the amount of voltage output to all your cores. asus probably assumed all their consumers will be buying high end coolers and leaving this setting ON for the unsuspecting builder :D your cooler may not be able to handle an all sync setting for 6 cores. of course you may leave it enabled if you see temps stabilizing.


    Updated BIOS, Disabled MCE long ago, checked - still disabled :) Sinc all cores disabled - left setting as 'per core'
    But the jumps are still present :S
    Reply to stas1990
  5. have you tried increasing your AVX offset? whats your current value now? 1? 3?
    Reply to marksavio
  6. marksavio said:
    have you tried increasing your AVX offset? whats your current value now? 1? 3?


    No, since CPU is not OC's and using standard intel boost setting - to 4,7 Ghz maximum, but i ve never seen it go above 4.4.
    Reply to stas1990
  7. oh youre still running in stock speed even with XMP still disabled? have you tried just enabling it first and see how it goes?
    btw the temp spikes are normal and its more obvious with 6 cores. as long asyour overall temps dont go over 80C as read by your asus OC software or the HWmonitor.
    lets try letting it run in 4.7. we can try running prime95 torture test. and disbale "run ffts in place". and do the Small FFts test.
    Reply to marksavio
  8. marksavio said:
    oh youre still running in stock speed even with XMP still disabled? have you tried just enabling it first and see how it goes?
    btw the temp spikes are normal and its more obvious with 6 cores. as long asyour overall temps dont go over 80C as read by your asus OC software or the HWmonitor.
    lets try letting it run in 4.7. we can try running prime95 torture test. and disbale "run ffts in place". and do the Small FFts test.


    Sorry if confused you - XMP is enabled in order to increase the memory clock speed from default 2133 to 3000.
    Considering that info - should i execute the action plan that you pointed out above?:)
    Reply to stas1990
  9. yes please do. we just wanna know if your cpu is working as it should with your cooler.
    Reply to marksavio
  10. marksavio said:
    yes please do. we just wanna know if your cpu is working as it should with your cooler.


    Launched Small FFTs test(first option).
    As soon as completed - i ll give you and update.
    Thank you for helping!
    I am still running with standart intel boots settings - at 3.7 starting and ending at 4.7 Ghz
    Reply to stas1990
  11. marksavio said:
    yes please do. we just wanna know if your cpu is working as it should with your cooler.


    So far: at the beginning temps peak to 85-90 dergrees, then in 10 seconds stays stable at around 65-69 degrees depending on the core, temp fluctuation per core is 1-2 degrees, seems good. What do you think? Test ran around 2 hours.
    Fans behave normal and keep the RPM's at a fair rate!
    Reply to stas1990
  12. then go for the next step and overclock! good luck man. at least you know your stock performance is stable with your cooler rn.
    Reply to marksavio
  13. marksavio said:
    then go for the next step and overclock! good luck man. at least you know your stock performance is stable with your cooler rn.


    Thank you!
    But i still don't get it why the problem is present, its still unsolved :D
    Reply to stas1990
  14. i havent personally experienced those "jumps" at all on my asus board. i guess not all boards of the same brand are operated on the same way by default. mine was defaulted to MCE on and i had to manually change it to the non-MCE version. the first time coz i thought i didnt need it. then i reflashed back to the original MCE version and it looks like my system can handle it. during those times i havent experienced weird performance anomalies on my cpu. im sorry i cant help you any more. most likely some other "toms hardy" who has more experience could shed u some light on that. :D but to me,you may need to adjust your AVX offset and may need to re-apply your cooler with a better thermal paste to get rid of those "jumps" you are mentioning. but like i said its normal for multicores coz not all of them share the same temps. so it looks like jumps to you since it switches the temp of each core on your monitoring tool.
    Reply to marksavio
  15. marksavio said:
    i havent personally experienced those "jumps" at all on my asus board. i guess not all boards of the same brand are operated on the same way by default. mine was defaulted to MCE on and i had to manually change it to the non-MCE version. the first time coz i thought i didnt need it. then i reflashed back to the original MCE version and it looks like my system can handle it. during those times i havent experienced weird performance anomalies on my cpu. im sorry i cant help you any more. most likely some other "toms hardy" who has more experience could shed u some light on that. :D but to me,you may need to adjust your AVX offset and may need to re-apply your cooler with a better thermal paste to get rid of those "jumps" you are mentioning. but like i said its normal for multicores coz not all of them share the same temps. so it looks like jumps to you since it switches the temp of each core on your monitoring tool.


    Thank you! I will try with new paste and AVX offset change and meanwhile I hope some1 here is also experienced same problem as I did :)
    Reply to stas1990
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