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8700K Temperature Check - Which application?

Roobir

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Hi Carbonites,

I want to have a look at my OC possibilities on the 8700K, but I'm not too sure which application to trust regarding temperature of the CPU.

My BIOS GUI shows about 19-24c today, but Windows never shows any lower than around 35c (looking at RealTemp, Corsair LINK, and MSI AfterBurner).

I installed the MSI Command Centre application, and that application shows a different temperature (which is very similar to BIOS temperature). Check out the following image, while idling in windows a few minutes ago:

hI4DAo6.jpg


I've highlighted above the temperatures and maximums noted so far. Which application do you think is actually correct? 22c or 36c while idling?

Also, check out the snippet taken while running IntelBurnTest:

PAL0nAc.jpg


Is the real temperature of the CPU 60c (MSI application) or 75-77c (according to RealTemp, Corsair LINK, and MSI AB)?

Let me know if anyone else is struggling with temperature on the 8700K
 
Not sure if this will help but my 8700 non-k idles in 30's and peaks in early 70's. Using cooler master seidon aio.

Sent from my SM-G950F using Tapatalk
 
I use CoreTemp and HWMonitor. But you might be having the same problem as I do, my 7700K runs way too hot to even try and overclock. Saving grace is that I run it in one of the Asus boards, so with Core lock the board runs it at 4.6 during gaming. If I start touching any of the clocks the CPU runs into the 80's within 10-20s of starting Prime95.

I am at the point where I would have to delid before I can extract more speed out of it, but on the flip side need to hold off in case I need to sell it on with warranty intact.
 
Are these hot running CPU's by nature?... I get better temps on a 6950X at 4Ghz with a Corsair H75..

I use Intel XTU to stress and measure temps though..

Edit I am asking a question not trolling before someones panties get knotted..
 
Are these hot running CPU's by nature?... I get better temps on a 6950X at 4Ghz with a Corsair H75..

I use Intel XTU to stress and measure temps though..

Edit I am asking a question not trolling before someones panties get knotted..
I get max 72 degrees on xtu on 8700k.this is when cpu turbo set to 4.7ghz. 1.2v.

This seems normal though.

Sent from my VKY-L29 using Tapatalk
 
I'm still not sure which application to trust. MSI Command Centre shows same CPU temperature as the BIOS. HWMonitor, CorsairLink, MSI AfterBurner and RealTemp show much higher. :(
 
What's your ambient temperature? Hard to believe it's running at 22C while you're in Centurion.
I think your MSI software is giving false temps and better go with Realtemp.
 
Ambient temperature is sort of cool in the room - between 25-30 (higher if there is a heatwave).

I have found something very interesting with this CPU and Motherboard.. the VCORE goes up to 1.45+ during stress tests done with IBT above. I have manually changed the VCORE to a strict 1.1v and have the following results:

fUchj9W.jpg


Thats a 18c temperature drop by manually under-volting from the "AUTO" setting. I have done a similar volt/frequency curve on the GTX1080 to only use 0.975v during boost (instead of 1.09 I think). I'll run 3DMark to check if all systems are collectively stable.
 
It's simple, the third-party utilities like Core Temp are reading the absolute CPU temperature directly from the chip, while your motherboard is applying some sort of negative offset (presumably being determined by its own temperature sensors) to provide you with a "relative" CPU temperature. As you've already seen, the latter isn't particularly useful, and I'd ignore it.

How do I know this? Well, you have stated that your ambient temperature is around 25 degrees Celsius, yet the BIOS is reporting a CPU temperature of under that value, i.e. below ambient. Basic physics means that it is impossible for a standard air or water cooler like your H80i to cool something to below ambient.

Always assume the highest temperature reported is the correct one.

As for voltage tuning, of course dropping VCore from 1.45v to 1.1v (a ~25% decrease) is going to have a massive effect on your temperatures. The "auto" VCore setting only exists for those who want their overclock to work without having to worry about stability testing, and the only way to guarantee a stable overclock (assuming the chip is capable of it) is by pushing volts through it.

If you are anything more than incredibly lazy, you will always get a much better result by applying a voltage offset, then tweaking it up or down based on stability and temperatures. Yeah, you might get a few blue screens if you pull the voltage too low, but that's part of the fun of tweaking.

BTW, 4.7GHz @ 1.1V without delid is quite a nice result. These chips seem to need around 1.4V for 5GHz, and you've already been at 1.45V so you could probably hit those clocks with ease (assuming your chip is capable). Personally I'd try a once-off 5GHz run just to see if the chip can do it, then back off to 4.7GHz or less for daily use.

OT: Seems like Intel's 14nm process has finally come good with the "14nm++" they are using for Coffee Lake, considering that 6-core Coffee Lake chips clock higher at lower volts than their 4-core Kaby Lake predecessors.
 
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Auto voltage is a sinner of note, and yes Assimilator is correct. Your bios and msi app are sucking thumbs, on standard air/water cooling room temp is the lowest your cpu will go.
 
Thanks for the feedback gents!

I'll focus on HWMonitor and MSI AB for now (I always run MSI AB, so might as well).

That being said, I have some very good results in terms of undervolt on both the GPU and CPU. I'm currently running 4.8GHz with 1.135v. I could only get to a stable 5GHz OC using 1.3v or 1.31v - using mode 4 LLC. However, the difference in temperature between 4.8 vs 5.0GHz is quite rough. Currently, while using the 4.8GHz configuration, the Intel Burn Test load lets the CPU go up to almost 60c. Using 5GHz OC the load of IBT takes the CPU up to 73c :-(

I'll try the 5GHz OC in the winter again - for now the 4.8GHz should be more than enough!
 
My idle temps were as low as 27 degrees according to bios and many of the other monitors however they do tend to rise(when weather gets a bit warmer seems to sit around 39 degrees and when overclocked to 5ghz around 42 to 45 degrees idle) under load and on burn tests on stock speeds it peaks at 75 to 79 degrees(when overclocked 5ghz it tends to peak around 80 degrees with temp spikes of 86 degrees plus). I'm running a constant voltage of 1.375v when I overclock to 5ghz because at that voltage and only that voltage does it seem to be somewhat stable on my board.

Also interesting to note when using BF1 on overclock and running MSI afterburner to judge temps etc it sits at 75 to 80 degrees on 70 percent CPU usage then if you hit 100 percent or close it gets spikes of 87 degrees at times however if you play for around 4 hours the spikes get higher and higher as if the AIO starts to struggle to keep up with the temp.

Currently running a H1200 Pro AIO

Other things I've been checking with my overclocks using Intel Extreme Tuning Utility was to look at VRM temps, Power Throttling, Thermal Throttle etc and even with my high temps absolutely none of these items throttle on any of my stress tests and burn tests. System is definitely more stable from the feel at 4.8 to 4.9 ghz and a bit of a pray that it lives on 5.0ghz.

This is all due to change when I get my cpu back from Rebeltech delidded.... say goodbye to your little stinking warranty.... I mean say hello to my little friend.

I am furthermore considering a higher airflow case upgrade and I might ditch the antec H1200 pro for something of the Corsair range for a few degrees lower but the largest difference should be the delid. I want to see what it does because I know each CPU is different and no two yield identical results plus from all my tests on water cooling AIO mine runs hotter then many others I have seen.

FYI another interesting thing to have seen in Intel Extreme Tuning Utility it also shows you TDP and on overclock on a few of my tests mine was as high as 190W.... that's bound to be a hot moment lol.
 
Use the last version of Prime95 which does not use AVX: https://overclocking.guide/download/prime-95-v26-6-64-bit/

"The correct torture test settings are important to test the right things of your system. These are the most important FFT sizes:

1344K: High load on the core and the core voltage
8K: Maximum heat production to test your cooling solution
800K: Test RAM stability
864K: Test the whole system
If you are overclocking your CPU, the first step would be to test the core clock. Set the Min FFT and Max FFT size to 1344 and check “Run FFTs in-place”. Also make sure that the time is set to 15 minutes."

So in this case for checking temps make Min and Max FFT size 8. Run for 30min. You should get to max temp in about 20min and will be a good early indicator for stability.

https://overclocking.guide/stability-testing-with-prime-95/
 

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