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12700K at 100C after few minutes of Prime95

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12700K at 100C after few minutes of Prime95

Hello everyone,
Recently just got a CPU + Motherboard upgrade and got a Noctua NH-D15 CPU cooler to go with it.

Case Specs: http://nordic.thermaltake.com/products-model.aspx?id=C_00001719
Ran Prime95 and noticed the CPU goes to 100C within 3-5 minutes. I stopped the test immediately as it didn't seem normal. Now I'm kind of wondering if that's normal and checking if I should revise my fan setup for my case.
My current fans:
Noctua NF-P14s redux 1500rpm = 78.69 CFM (BACK EXHAUST)
Noctua NF-A15 x 2 (CPU Cooler) = 67.98 CFM (EXHAUST directed towards back 140mm exhaust fan)
Noctua NF-A20 = 86.46 CFM (SIDE INTAKE)
Noctua NF-A20 = 86.46 CFM (TOP EXHAUST)
Noctua NF-F12 = 54.97 CFM (BOTTOM INTAKE just under the GPU and besides PSU)
Thermaltake Pure 20 TT-2030 = 129 CFM (FRONT INTAKE, kind of doubtful if that's the true CFM)

Anyone have any suggestions on what to change or swap around?


Current system specs:
CPU: Intel 12700k
MOBO: MSI PRO-Z690A DDR4 Wifi
RAM: Corsair Vengeance LPX DDR4 2x8GB
GPU: Gigabyte 1080ti Aorus Xtreme
PSU: Thermaltake M850W
Case: Thermaltake Chaser MK-1
 
Last edited:
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Going off reports from others, it's likely not anything wrong with your cooling setup, but rather a problem with your motherboard. It may have physically bent under the load of installing the CPU and cooler, and now has uneven contact across the CPU.

 
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System Name BK-201
Processor Intel i7-7700K 4.20GHz
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Wow well that's shitty to say the least. I changed the motherboard + cpu literally just 2 days ago.

At least it's only when using Prime95, gaming and anything else (so far) seems totally fine as far as temps go.

I was thinking that I might have messed up on the thermal paste application.
 
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Joined
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129 (0.03/day)
System Name BK-201
Processor Intel i7-7700K 4.20GHz
Motherboard GA-Z270X-UG
Cooling Cryorig H7 Tower Cooler
Memory Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3200MHz (PC4-25600)
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Case Thermaltake Chaser MK-1
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Power Supply Thermaltake Smart M850W Modular 850 Watts
Mouse Razer Naga Hex v2 Chroma
Keyboard Razer Black Widow Ultimate Chroma
Ambient temp is usually around 25C (24C to 26Cish) at least during winter.

Was testing some God of War and temps usually hover around 60c I think.
 
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Check the power limit settings in BIOS, @sneekypeet who uses a MSI board for testing RAM said it defaulted to giving his CPU 4096W of power, which could be why yours is running hot.

EDIT: Yes there might be an issue with mounting as I've seen reports of that too, JaysTwoCents did a video on how to fix the mounting issue. Also I realize if you're in the 60c range for gaming, and 100c when using Prime, you might be fine on everything, just Prime can cook a CPU.
 
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temps usually hover around 60c I think.
sounds like you have nothing to worry about then imo. Prime isn't a really good example of real world conditions, it's more a stress test to make sure everything is stable.

And I forgot how beefy those noctua's are... used to run one forever ago in an old build. I wouldn't touch them nowadays tho, ignoring the weight they're just big and ugly (and make doing anything in the case that much more annoying)
 

tabascosauz

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Ambient temp is usually around 25C (24C to 26Cish) at least during winter.

Was testing some God of War and temps usually hover around 60c I think.

Not sure how CPU-demanding God of War is, but that sounds pretty good?

IIRC all-out AVX2 loads like default Prime95 small FFT will just run like an inferno on 11th and 12th gen. Aside from a small AVX offset (do they even do that anymore) I don't think Intel significantly throttles power usage during P95. The only reason Ryzen doesn't do the same is because AMD's boost algorithm is hardcoded to throttle insanely hard upon detecting small FFT AVX. AT tested the 12900K when it came out and it was also running balls-to-the-wall at 272W in their own AVX2 test, which I don't expect to be more demanding than P95 Small.

12700K is getting toward the upper end of what an air cooler on Alder Lake can realistically handle anyways.

The socket bending issue shouldn't a problem for a brand-new system that was just assembled 2 days ago. The warping happens over time, and I'd expect your temperatures to be noticeably bad in other workloads as well such as games.
 
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I would hit the roof super hard, if that happened to me!
Hopefully, it's not like the fiasco that some people apparently reported with the 3rd-gen Core i series, about 10 years ago now! Where people had to take the IHS off and change the TIM, if not running them delidded!

IIRC all-out AVX2 loads like default Prime95 small FFT will just run like an inferno on 11th and 12th gen. Aside from a small AVX offset (do they even do that anymore) I don't think Intel significantly throttles power usage during P95. The only reason Ryzen doesn't do the same is because AMD's boost algorithm is hardcoded to throttle insanely hard upon detecting small FFT AVX. AT tested the 12900K when it came out and it was also running balls-to-the-wall at 272W in their own AVX2 test, which I don't expect to be more demanding than P95 Small.
Some years ago, it looked like nothing could beat Linpack on Intel, period. Years ago, I would think that it would shut down with a Linpack load with the CPU in that kind of condition.
I remembered when I couldn't ever get as high of core temps with Prime95, thus it felt like I was cheating to run Prime95, LOL! I know that small FFTs are by far the best for testing cores with Prime95, but I still don't know if it can hold a candle to Linpack, especially the recent versions. Sounds like Prime95 improved, but I guess I need to test that again. I'm actually scared to run Linpack on AMD CPUs, because of a problem where there are possibly false errors. Where I never saw Prime95 with large FFTs fail. But it should have failed if the RAM or bus was unstable!
 
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60C seems warm for gaming in winter, under a noctua fan cooler my 9900k is usually between 40C and 50C. maybe 55C in mid summer.
 

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60C seems warm for gaming in winter, under a noctua fan cooler my 9900k is usually between 40C and 50C. maybe 55C in mid summer.

temps really depend on what kind of games you play and the monitor you use. i imagine if you played witcher 3 on max settings at 1440p high refresh, those temps would be more like 65-70 celsius
 

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@sneekypeet who uses a MSI board for testing RAM said it defaulted to giving his CPU 4096W of power

On my MAG Carbon Wifi, when you clear the CMOS and dive into the BIOS, there is a popup window that asks about cooling. Water is 4096W, aftermarket air is like 2000W, and only when you set it to boxed cooler does it set 241W as the cap. It may not be on all MSI boards though.
 
D

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On my MAG Carbon Wifi, when you clear the CMOS and dive into the BIOS, there is a popup window that asks about cooling. Water is 4096W, aftermarket air is like 2000W, and only when you set it to boxed cooler does it set 241W as the cap. It may not be on all MSI boards though.

Same behavior on a Z690 Pro-A WiFi DDR4
 
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100C is too high.

Can you run CPU Multicore bench on Cinebench R23 and report back on the temps?

Use HWiNFO to check your temps.

I am also on a 12700k and Initially when I ran tests I was getting around 90C. I found out my motherboard had this feature called Multi-Core Enhancement (MCE) enabled. Disabling that and underclocking the CPU by 0.025v helped lower temps. Now I get low 80s while running Cinebench R23. Check your motherboard to see if you have something similar and disable as that increases the CPU voltage.

My temps after completing multicore run on Cinebench R23.

CPU cooler I am using is SilentiumPC Fortis 5 Dual Fan.


1642550645610.png
 

ir_cow

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I'm not surprised by the 100C. I have to downclock to 4.2GHz for the Prime95 VRM tests just to keep it below 290 watts. Solution? Don't run Prime95 because it will pull 330+ if allowed.

If you don't thermal throttle with CineBench R20 after looping it for a bit, you are golden.
 
D

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Doh i misread the Z690 Pro-A WiFi DDR4 bit, mine Z690-A WiFi :s yes Asus

Totally get it - I had to check when I looked my post again and thought I had written Strix-A DDR4 :laugh:
 
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Benchmark Scores They're pretty good, nothing crazy.
Im super tempted to run a soft 2tb x 3 raid array for my gaming drive... 11 GB/s... give those efficiency cores stuff to do.
 
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On my MAG Carbon Wifi, when you clear the CMOS and dive into the BIOS, there is a popup window that asks about cooling. Water is 4096W, aftermarket air is like 2000W, and only when you set it to boxed cooler does it set 241W as the cap. It may not be on all MSI boards though.
It does that on my Z590 Unify too. But for tower air cooler the power cap is 288w, no where near 2000!
 

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It does that on my Z590 Unify too. But for tower air cooler the power cap is 288w, no where near 2000!
Could be a fluke. I am finding this board has other bios related issues, so at this stage, anything is possible.
 
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Could be a fluke. I am finding this board has other bios related issues, so at this stage, anything is possible.
Sounds a bit like my Z590 Gigabyte board to some extent. Not claiming its a bad board, but settings the user dials in did not stick when the OS booted up to the desktop.
 
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Just curious for others like myself despite fixing limits that still hit 100c during prime95, what program did you end up using to ultimately determine if the cpu is stable in the long run as a result?
 
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