i7-8700k runs insanely hot even at stock speeds ?

[Krit]

Hi guys!

My problem is when i run intel burn test my stock i7-8700k cpu runs very hot even at stock speeds and voltages. Only think that is overclocked is ram 3333MHz @ 1.35V but thats all. Cooler is premium noctua NH-D15S and case ventilation is decent with 3 case fans. So is these temps to hot or it's normal ?

 

[RejZoR]

Are you using ASUS motherboard? Those tend to use MultiCore Enhancement which pushes ALL cores to the Turbo clock out of the box by default...

 

[Krit]

No it's MSI with 4.3GHz on all cores.

 

[P4-630]

4.3GHz on all cores.

What happens when you set it at turbo stock speeds?
So disable highest turbo of all cores.

 

[Krit]

What happens when you set it at stock speeds?

It is on stock speeds! Just ram is overclocked.

 

[RejZoR]

Well, then say hello to crappy thermal paste underneath IHS, you know, where solder should have been but Intel is too god damn cheap and greedy to use it...

 

[Aquinus]

case ventilation is decent with 3 case fans

Placement, direction, and ambient temperatures matter. You can have good airflow but, if it's not flowing the right way maximizes the removal of heat from the case, then it's not going to help. Also, max turbo frequency is 4.7Ghz on this chip and if it's hovering around 80*C at 4.3Ghz, it's likely thermal throttling which means that heat isn't being removed well enough.

 

[EarthDog]

He set all cores at 4.3.

There's something wrong here?? Its a bit warm for the clocks, but i see nothing remotely "insane" about these temps.

Edit: i see... hes at stock... that is where all cores boost is 4.3. Since hes stock, voltage at 1.25 is likely too much and is on auto.

 

[Aquinus]

He set all cores at 4.3.

That's what CPU-Z is saying but, he also said:

It is on stock speeds!

So how about we get a clear answer on what the OP has done because, misinformation will get us nowhere.

but i see nothing remotely "insane" about these temps.

81*C is when Intel chips start thermal throttling, is it not? It is for my 3930k and 3820. If we get a reading off of the PECI sensor, we will know real fast if it's throttling or not.

Edit: It might be a bit higher than that but, not by much.

 

[EarthDog]

See my edit.

They throttle at 100c. 90c during a stress test is fine.

AFAIK, your cpu tjmax is the same...100c.

Edit: Realtemp will show your tjmax...which may be 91c...

 

[cucker tarlson]

He set all cores at 4.3.

There's something wrong here?? Its a bit warm for the clocks, but i see nothing remotely "insane" about these temps.

My thoughts exactly. 80-84 on IBT is pretty standard for Intel's chips. A bit warm maybe cause his voltage at stock sits at 1.256v (1.23v VID), which is probably more than needed. I'd try set 1.20-1.21v manually to get maybe 1.23v during stress test. That'd bring it to 75-80 degrees max, which is the norm.

 

[EarthDog]

These things stock are around 1.1v give or take.

 

[Hnykill22]

Has it been running at these temps from the start or did this happen over time?. i would start by re-applying thermal paste and make sure the cooler is seated the right way. this is not normal. i suspect bad contact with the cpu cooler.

 

[cucker tarlson]

These things stock are around 1.1v give or take.

whoa then the mobo pumps a lot more voltage than needed, I heard there's a lot of confusion with auto voltage on new intel chips. manual voltage is the best solution then.

Has it been running at these temps from the start or did this happen over time?. i would start by re-applying thermal paste and make sure the cooler is seated the right way. this is not normal. i suspect bad contact with the cpu cooler.

It's probably about the voltages, not the cooler.

 

[droopyRO]

Well, then say hello to crappy thermal paste underneath IHS, you know, where solder should have been but Intel is too god damn cheap and greedy to use it...

My 8600k at 4800Mhz 1.2V gets to 80ºC only in IBT or Prime, with RealBench 2.54 it gets to a max of 75º.

Hi guys!

Lower you core voltage, also what LoadLineCalibration are you using ? try the lowest setting. With that cooler you should have lower temps than mine.

81*C is when Intel chips start thermal throttling

More like >100º at least for my CPU and 4770k/3770k i tested with.

 

[trog100]

if a 4/8 7700k runs hot it figures to me that adding two more cores 6/12 is gonna run hotter..

thermal tempts hold the 7700k back the same thing has to apply to the 8700K even more so..

mostly they will rely on all cores not being used..

trog

 

[Aquinus]

AFAIK, your cpu tjmax is the same...100c.

Edit: Realtemp will show your tjmax...which may be 91c...

Not to get side-tracked but, Linux tells me:

$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +39.0°C  (high = +81.0°C, crit = +91.0°C)

I would expect the CPU to gradually throttle more after 81*C as 91*C is approached where throttling would progressively turn the clocks down based on temperature. Either way, this is a distraction. I think we can agree that auto voltage is providing too much juice. I would use a negative voltage offset and see if it stays stable. If it does, problem solved. If it doesn't, it could be the silicon lottery at work. It does happen.

 

[EarthDog]

See what realtemp or core temp says. It reads the registers. Tjmax is the throttling point.. shouldnt be less.

Anyway... feel free to pm if you want to hash it out.

 

[dorsetknob]

https://www.google.co.uk/search?q=i...x-b&gfe_rd=cr&dcr=0&ei=es71WfnDBdCp4gStlZbABg
There were many Tech Reports on quite a few H/W sites ( even here at TPU) of Coffee lake CPU having Temp and therefore Throttling Issues
Rest Assured your not alone with this problem
Even Intel acknowlage it runs extreemly hot if Overclocked
obligatory Vid

 

[trog100]

See what realtemp or core temp says. It reads the registers. Tjmax is the throttling point.. shouldnt be less.

Anyway... feel free to pm if you want to hash it out.

yes 100 C is the throttle down point.. this is what real temp shows.. the chip will throttle down to maintain 100 C..

intel quite clearly think 100 C is okay.. i recon its time people caught on to this.. my 7700K hits 90 C on regular basis when its being being used..

the thing is i no longer consider 90 C "insanely" hot.. just normal.. he he

trog

 

[Jetster]

The problem is Intel burn test

 

[Bill_Bright]

81*C is when Intel chips start thermal throttling, is it not?

It depends on the processor.

I see warm (84°C), but not "insanely hot". In other words, I don't see a problem here.

Instead of checking your temps under artificial conditions, what are your temps under real-world use?

 

[trog100]

the intel chips do not throttle at less than 100 C can we get this straight.. they run at whatever they are set to run at until they hit 100 C.. then they throttle back to whatever speed keeps them at 100 C..

they will not throttle at 99 C it has to be 100 C..

they dont gradually throttle down.. its instantaneous at 100 C.. the chip is never allowed to exceed that 100 C temp point..

trog

 

[EarthDog]

It depends on the chip is correct. Tjmax is different for For the OP, it is 100C. For Aquinas, it's 91C.

Temperatures can go above 100C. There is a thermal shutdown several C higher.

 

[erocker]

@Verbatim Check your VCCIO and VCCSA voltages.