8700k insane temps

malik11 · Jan 21, 2018

my brother wanted to upgrade his pc so i gave him my 7700 my motherboard and rams,

i bought an i 7 8700k, asus strix Z370F and installed my noctua nh-d14.

the thing is this cpu is extremely hot i have never ever seen a cpu this hot and i have used an amd 8350fx for 4 years.

no OC i enabled intel turbo so all cores @ 4.7ghz they never throttle its always steady.

1-core temps seem to fluctuate and are never the same one core would be 36c and another 44c thats on idle when stress tested same problem on higher temps.

2-temperatures are too high they reach 90c-95c with a noctua d14 which is very weird.

also temps on idle are changing constantly 32c-47c.

another thing is when i start prime95 it instantly jumps from 40c to 90c and not gradually increasing.

system never shutdown never throttles performs well but no chance to OC. and i was also wondering if these temps are normal or is it dangerous.

superninja12 · Jan 21, 2018

poor instalation of the cooler, probably no seal removed.

biglizard · Jan 21, 2018

Everything on Auto? Must be.

What is vcore under load. Many of these chips will run at much lower voltages than what auto settings are applying.

What version of Prime 95?

Those temps are no bueno.

Supernova1138 · Jan 21, 2018

Yeah, setting all core Turbo to 4.7 is not a great idea without extreme high end cooling. That mode pushes way too much voltage through the chip to guarantee stability, with most boards pushing something like 1.35 to 1.4V with that mode enabled. You should be able to achieve that clockspeed on a much lower voltage with a manual overclock and much lower temperature.

malik11 · Jan 21, 2018

superninja12 :

what do you mean no seal removed?

i installed the cpu normally and i locked the metal bracket and installed the cooler.

malik11 · Jan 21, 2018

Supernova1138 :

i tried setting the voltage to 1.24 clocks started dropping and some threads wont work i guess voltage is not enough.

so i went up to 1.26 which was enough but the temps are still high its not going beyong 91c but its still high

superninja12 · Jan 21, 2018

malik11 :

the plastic cover has probably not been removed, or a poor assembly of the cpu cooler or maybe too much thermal paste.

malik11 · Jan 21, 2018

superninja12 :

plastic cover???

there was only the black cover on the cpu socket which i removed ofc.

what other plastic is here?

superninja12 · Jan 21, 2018

there is a plastic under the cpu cooler that goes on top of the cpu..

https://i.imgur.com/G40jbvb.png

malik11 · Jan 21, 2018

superninja12 :

oh well on the noctua there was only a plastic cover which i removed.

The Original Ralph · Jan 21, 2018

for the hey of it, reseat your cooler, you might have used too much thermal paste or trapped a bubble in it

2nd - what are you using to monitor temps? If the Asus AI Suite III, try HWMonitor (CPUID) or even monitor them in the intel XTU utility

malik11 · Jan 21, 2018

well i tried to manually overclock but this time i turned intel turbo mode off and ASUS MULTICORE ENHANCEMENT off.

on 1.26v max temp is 75 on the socket and 69 on the cores BUT my cinebench score dropped from 1528 to 1193 i dont understand its the same clock speed how did this happen???

Update: it seems like i cant OC when turbo mode is off cinebench score dropped because cpu was on stock speed 3.7 lol
so now back to the same problem.

is it normal for Vcore to increase when stress testing ? i set it to 1.26v it goes up to 1.29v why is this happening?

malik11 · Jan 21, 2018

The Original Ralph :

i have used hwmonitor and msi after burner both giving me the same readings.

Supernova1138 · Jan 21, 2018

malik11 :

For ASUS boards you have to have the CPU core Turbo setting on to Overclock, but there is a separate setting for TurboBoost that you should disable. As for voltages going above your set voltage, assuming you aren't looking at VID, which just states the voltage the CPU requests, then high Loadline Calibration settings can result in a higher Vcore than what is set in an effort to combat voltage droop. If you did change the LLC setting from its default, then you probably should change it back, as cranking up the LLC is only really needed when you're getting into higher voltages, and you don't have the cooling to do that anyway.

malik11 · Jan 21, 2018

Supernova1138 :

The one im looking at in cpuid is vcore i set it to 1.26 it shows 1.248 and then goes back to 1.26 and when use prime it goes up 1.28-1.29.
I dont want high oc or anything i just want 4.7 on a reasonable temp.
I am not an expert this is my first intel cpu to oc.
There are just too many settings that i dont understand

superninja12 · Jan 21, 2018

Just re-mount the cooler.
Its not installed in the right way.

CompuTronix · Jan 21, 2018

Guys,

This Thread took a left turn at the 3rd post:

biglizard :

The question was never answered.

malik11,

Q: Which version of Prime95? It's an important question because version matters.
Q: Also, since no one thought to ask, what is your ambient (room) temperature?

CT :sol:

marksavio · Jan 21, 2018

careful of that prime95 version. its is known to break your CPU. best to disable all avx commands on the tests. or just set an avx offset on your OC.
most likely its your cooler thats not stabilizing yoru temps @4.7Ghz all coresat full stock turbo speeds.
nh-d14 is a midrange for that high end cpu. you can however try to increase the fan curve at lower temps in your BIOS or software. i hope you are using the nt-h1 paste included with the cooler as well.
since you are using an ASUS board. disable the MCE. this will lessen the voltage load on all cores thus lowering significant temps

malik11 · Jan 22, 2018

CompuTronix :

im using p95v294b7.win64
room temp is never above 21c

malik11 · Jan 22, 2018

marksavio :

how do i set avx offset on my OC?

i am using the paste that came with the cooler yes.

if by MCE you mean multi core enhancement i disabled that.

is there any alternative for prime?

malik11 · Jan 22, 2018

i tried using realbench on 5.0ghz at 1.30v for 1 hour test is passed max temp i saw was 78c on the socket and a little lower on the cores. im not sure why prime burns my cpu.

marksavio · Jan 22, 2018

its because of your avx commands. thats more CPU intensive compared to when you are gaming at the same speed/freqs. you can set the AVX offset in your BIOS OC Tweaks. just set a value of 3. it means if your max speed is 5.0. it will downclock your multiplier to 47. 4.7Ghz. this will relieve some stress from your CPU outside gaming.

malik11 · Jan 22, 2018

marksavio :

i set the avx to 3. i managed to get a stable overclock @ 5.0ghz 1.315v.
i stopped using prime and used intelburn test and realbench both are stable.

one last thing in cpuid the first voltages tap the VCORE keeps jumping from 1.32 to 1.36 and when that happens the temp jump also from 75 to 81 and then both drop back to normal is there a way to stop this from bios?

i know im asking too many questions but im still learning how to OC.
thank you all for helping

CompuTronix · Jan 22, 2018

malik11,

Do not use any version of Prime95 later than 26.6. Here's why:

Your 8700K has AVX (Advanced Vector Extension) Instruction Sets. Later versions of Prime95 run AVX code on your processor's Floating Point Unit (FPU), which is nearly a 130% workload, and will peg your Core temperatures. 26.6 is a 100% workload which does not use AVX, so it's safe to use and will give you realistic Core temperatures up to 20°C lower than later versions. Give it a try:

• Prime95 v26.6 - http://www.mersenneforum.org/showthread.php?t=15504

AVX can be disabled in Prime95 versions later than 26.6 by inserting "CpuSupportsAVX=0" into the "local.txt" file in Prime95's folder. However, since Core temperatures will be the same as 26.6, it's easier to just use 26.6.

Intel Burn Test, which is not written by Intel, is nearly a 120% workload, so that's why it also gave you high Core temperatures.

Prime95 v26.6 Small FFT's is ideal for thermal testing, and RealBench is ideal for stability testing.

Here's the operating range for Core temperature:

Core temperatures above 85°C aren't recommended.

Core temperatures below 80°C are preferred.

Core temperatures increase and decrease with Ambient temperature.

You might want to read this: Intel Temperature Guide http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

CT :sol:

malik11 · Jan 22, 2018

CompuTronix :

oh wow i did not know that.

i tried the prime version you recommended and it worked much better thanks!

i also read the topic and did some more research and found out my whole OC setting is wrong.

i stressed tested my cpu on prime for almost an hour with the new OC settings 5.0ghz on 1.23v no problems so far 76 socket and 72 core, i was on 1.31v because i read online thats were 8700k should start when going for 5ghz but then i started to go down untill 1.22 thats when i got a BSOD so 1.23v is nice so far im gonna stress test it before i go to sleep.

thank you so much for your help.

you think i can go higher than 5ghz? would it help in gaming on a 1080 ti?

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