6700k temps high and fluctuation between cores normal?

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negru08 Nov 4, 2017 @ 2:06pm

Current Specs:
I7 6700k OC at 4.5 with 1.315vcore
H115i AOI Water cooler
16gb DDR4 Ram at 3000 XMP

I am concerned about my temps. When I first boot the PC my idle temps are usually around 29-31C. If I dont do anything with it and just leave it on my temps will stay idle around 32-36C. I always seem to have one core that is always higher then the rest . I have triple checked to make sure my thermal paste was on there correctly.

As soon as I put any load on the cpu it skyrockets. For example if the CPU load is at 14 one of my cores will jump to 67-71C. But it never sticks to just one core. It jumps between the cores. But with that high temp. That cant be normal can it? If I do any stress test using any of the desired programs I get easily to 85-91C temps after 10 seconds on all cores. I dont know whats going on here.

I dont think my AIO is broken as the water temp tends to stay under 42c at the most. But that never keeps my cpu temp down when doing anything. Or are these jumping temps normal with 6700k?

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Showing 1-15 of 48 comments

Omega Nov 4, 2017 @ 2:15pm

You did reaply thermal paste everytime you checked if it was applied correctly, right?

What software are you using to check your temps?

What are you using for stress testing? Prime95/AIDA64? If so it is normal for the CPU to jump to 90c near instantly with torture stress testing software.

if only a single core spikes it is nothing to worry about, either the software is wrong or there is something wrong with the CPU temp sensors.

Kaihekoa Nov 4, 2017 @ 2:16pm

It is normal for one core/thread to load when doing things that aren't multi-threaded, and it's normal for all threads to load when stress testing. 91C is hot for such a limited overclock and your cooler, so make sure it's seated properly and redo the thermal paste.

DefinitelyNotMonk Nov 4, 2017 @ 2:23pm

I will say that your voltage seems pretty high for such a low clock speed, I would start by trying to oc with lower voltage for a start.
As mega said, you did apply new thermal paste each time right ? Although those temps don't sound to high for that voltage.

Big Boom Boom Nov 4, 2017 @ 2:35pm

Actually that Voltage is pretty normal for an i7-6700k. My i7-6700k running 4.7Ghz at 1.35V usually tops mid 70 during stress test with NH-D15S.

DefinitelyNotMonk Nov 4, 2017 @ 2:40pm

You should be able to get those clocks under 1.3, and 1.35 at only 4.5 is very high.

Edit, just realised op was at 1.315 not 1.35, my bad, still a 4.5 click should be considerably below 1.3.

Last edited by DefinitelyNotMonk; Nov 4, 2017 @ 2:41pm

negru08 Nov 4, 2017 @ 2:40pm

Originally posted by Omega:
You did reaply thermal paste everytime you checked if it was applied correctly, right?

What software are you using to check your temps?

What are you using for stress testing? Prime95/AIDA64? If so it is normal for the CPU to jump to 90c near instantly with torture stress testing software.

if only a single core spikes it is nothing to worry about, either the software is wrong or there is something wrong with the CPU temp sensors.

Yes I reapplied the past each time. I used all of them for testing. All of them are doing the same thing. Within 5 seconds I reach really high temps. The single core thing is with everything. I launch chrome I will see one core skyrocket then relax. Never the same core though. Always different.

Big Boom Boom Nov 4, 2017 @ 2:42pm

Not really, it's the first 14nm and a lot of people couldn't go past 4.6Ghz. Although at 4.5Ghz it beats Haswell running 5.0Ghz due to 10% uplift in IPC.

Omega Nov 4, 2017 @ 2:42pm

I say don't worry about it.

But you still haven't told me what software you are using for checking the CPU temps.

Last edited by Omega; Nov 4, 2017 @ 2:43pm

negru08 Nov 4, 2017 @ 2:42pm

Originally posted by DefinitelyNotMonk:
You should be able to get those clocks under 1.3, and 1.35 at only 4.5 is very high.

I sadly did not get the lottery winner. TO get 4.6 I need to push it to 1.345 which is to much for me personally. I found that I could get 4.5 with 1.315 and thats what I stuck to. Lower it crashes usually within a min of launch windows.

Originally posted by Omega:
I say don't worry about it.

What you still haven't told me what software you are using for checking the CPU temps.

I use CPUZ, Compare it to Core Temp, Corsair Link and compare it all to the temps posted on RealTemp_370. They are all realativly the same for temp.

Last edited by rotNdude; Nov 5, 2017 @ 9:02am

Big Boom Boom Nov 4, 2017 @ 2:44pm

That is VERY HIGH. CPU Z stress is crap, it never goes past 65 for me while in Warhammer or Prime 95 it shoots to mid 70s.

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negru08 Nov 4, 2017 @ 2:46pm

So then what could be the problem? I am sure the heatsink is on there correctly. Paste is properly applied. Vcore is higher then others but not as high as some others. My AIO seems to keep its water temps low.

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Omega Nov 4, 2017 @ 2:46pm

Originally posted by Big Boom Boom:
That is VERY HIGH. CPU Z stress is crap, it never goes past 65 for me while in Warhammer or Prime 95 it shoots to mid 70s.

^This

The CPUz Stress test is terible. My CPU skyrockets to 80-90c with Prime95, CPUz barrely gets it in the low 50's.

Also don't run lot's of monitoring software at once. They could conflict with eachother causing a system crash in a worst case scenario.

Last edited by Omega; Nov 4, 2017 @ 2:47pm

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