I got issue with i7-4790K. Processor temperature under load jumps up in a moment for 30 degrees after about 70 degrees is reached, so motherboard decides to shutdown system. BOX cooler installed, thermal grease changed 3 times with different greases while tests (best result was reached with Soviet "KPT-8" =). "Burning" utility is LinX 0.9.1 (linpack based utility), monitoring system is CoreTemp last version.
Current temporarily solution is downclock to 3.5GHz, core voltage limitation to 1.02V - system stable, temperature under full load is about 65 degrees.
Also i found a lot of same situations described at other sites, but with no solutions (most common was to return CPU via warranty).
Current questions is:
Thanks a lot for any ideas.
And excuse me for bad English =)
If, by "scalping", you are referring to the process of removing the heat spreader from the top of the processor, I have the following to say,
No, it is NOT an issue with the DTS sensors.
Hope this helps,
Thanks for your answer.
Warranty period for this CPU already expired, i bought it at august 2014.
I found some reviews which says where is "Next-Generation Polymer Thermal Interface Material (NGPTIM)" inside CPU between core and spreader. So maybe issue reason is TIM became degraded? CPU worked for 4.5 years with box cooler and without problems.
Of course, i will use more powerful cooler if i will proceed with scalping.
I just hoped it's some simple solution available, because this issue is meets often according to references in internet.
Also i don't like to scalp just to test will it help or not. At least because i don't know is it TIM, DTS or something other issue, and a risk to get CPU broken is high. If answer is "Yes - DTS sensors failed; No - no way to fix it", it looks like i have to use current CPU in downclocked mode, because next one used CPU may meet some issues soon (maybe it's possible to found new one, but nobody knows what will happened with it after few years of stock in unknown conditions).
Updated: sorry, i read you answer inattentively. I mean last phrase about DTS is not a reason of it - i'm still not sure. I will try to take graphs from some software under heavy load to show how it looks like.
Thank you once again.