Question possible cpu overclock temp concern??

packersfan036

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i overclocked my ryzen 5 2600 to 4.1ghz and 1.375v i ran cinebench r20 and the peak temp was 73c is that good? the cooler im using is a corsair h100i rgb pro. motherboard is a tomahawk b450. also the idle temp is fluctuating from around 34c to 40 or 42c.
 
Last edited:

Darkbreeze

Titan
Moderator
Idle temp makes no difference, at all, so long as it is below maybe 45°C, AND so long as your peak temperatures are below 80°C.

So 73°C is within tolerance. However Cinebench is not a useful tool for testing thermal compliance. It is not steady state, it is all over the board. You need a steady state load for thermal testing.

The bigger question anyhow may be, whether it is stable or not.


Quick and dirty overview of overclocking validation procedure.


Set CPU multiplier and voltage at desired settings in BIOS. Do not use presets or automatic utilities. These will overcompensate on core and other voltages. It is much better to configure most core settings manually, and leave anything left over on auto until a later point in time if wish to come back and tweak settings such as cache (Uncore) frequency, System agent voltage, VCCIO (Internal memory controller) and memory speeds or timings (RAM) AFTER the CPU overclock is fully stable.


Save bios settings (As a new BIOS profile if your bios supports multiple profiles) and exit bios.


Boot into the Windows desktop environment. Download and install Prime95 version 26.6.


Download and install either HWinfo or CoreTemp.


Open HWinfo and run "Sensors only" or open CoreTemp.


Run Prime95, either version 26.6 OR the latest version WITH the AVX and AVX2 options disabled in the settings menu that pops up when you start up Prime95, and choose the "Small FFT test option". Run this for 15 minutes while monitoring your core/package temperatures to verify that you do not exceed the thermal specifications of your CPU.


(This should be considered to be 80°C for most generations of Intel processor and for current Ryzen CPUs. For older AMD FX and Phenom series, you should use a thermal monitor that has options for "Distance to TJmax" and you want to NOT see distance to TJmax drop below 10°C distance to TJmax. Anything that is MORE than 10°C distance to TJmax is within the allowed thermal envelope.)


If your CPU passes the thermal compliance test, move on to stability.


Download and install Realbench. Run Realbench and choose the Stress test option. Choose a value from the available memory (RAM) options that is equal to approximately half of your installed memory capacity. If you have 16GB, choose 8GB. If you have 8GB, choose 4GB, etc. Click start and allow the stability test to run for 8 hours. Do not plan to use the system for ANYTHING else while it is running. It will run realistic AVX and handbrake workloads and if it passes 8 hours of testing it is probably about as stable as you can reasonably expect.


If you wish to check stability further you can run 12-24 hours of Prime95 Blend mode or Small FFT.


You do not need to simultaneously run HWinfo or CoreTemp while running Realbench as you should have already performed the thermal compliance test PLUS Realbench will show current CPU temperatures while it is running.


If you run the additional stability test using Prime95 Blend/Small FFT modes for 12-24 hours, you will WANT to also run HWinfo alongside it. Monitor HWinfo periodically to verify that no cores/threads are showing less than 100% usage. If it is, then that worker has errored out and the test should be stopped.


If you find there are errors on ANY of the stability tests including Realbench or Prime95, or any other stress testing utility, you need to make a change in the bios. This could be either dropping the multiplier to a lower factor or increasing the voltage while leaving the multiplier the same. If you change voltage or multiplier at ANY time, you need to start over again at the beginning and verify thermal compliance again.


A more in depth but general guide that is still intended for beginners or those who have had a small amount of experience overclocking can be found here:


*CPU overclocking guide for beginners



.​
 

packersfan036

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May 27, 2015
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Idle temp makes no difference, at all, so long as it is below maybe 45°C, AND so long as your peak temperatures are below 80°C.

So 73°C is within tolerance. However Cinebench is not a useful tool for testing thermal compliance. It is not steady state, it is all over the board. You need a steady state load for thermal testing.

The bigger question anyhow may be, whether it is stable or not.


Quick and dirty overview of overclocking validation procedure.


Set CPU multiplier and voltage at desired settings in BIOS. Do not use presets or automatic utilities. These will overcompensate on core and other voltages. It is much better to configure most core settings manually, and leave anything left over on auto until a later point in time if wish to come back and tweak settings such as cache (Uncore) frequency, System agent voltage, VCCIO (Internal memory controller) and memory speeds or timings (RAM) AFTER the CPU overclock is fully stable.


Save bios settings (As a new BIOS profile if your bios supports multiple profiles) and exit bios.


Boot into the Windows desktop environment. Download and install Prime95 version 26.6.


Download and install either HWinfo or CoreTemp.


Open HWinfo and run "Sensors only" or open CoreTemp.


Run Prime95, either version 26.6 OR the latest version WITH the AVX and AVX2 options disabled in the settings menu that pops up when you start up Prime95, and choose the "Small FFT test option". Run this for 15 minutes while monitoring your core/package temperatures to verify that you do not exceed the thermal specifications of your CPU.


(This should be considered to be 80°C for most generations of Intel processor and for current Ryzen CPUs. For older AMD FX and Phenom series, you should use a thermal monitor that has options for "Distance to TJmax" and you want to NOT see distance to TJmax drop below 10°C distance to TJmax. Anything that is MORE than 10°C distance to TJmax is within the allowed thermal envelope.)


If your CPU passes the thermal compliance test, move on to stability.


Download and install Realbench. Run Realbench and choose the Stress test option. Choose a value from the available memory (RAM) options that is equal to approximately half of your installed memory capacity. If you have 16GB, choose 8GB. If you have 8GB, choose 4GB, etc. Click start and allow the stability test to run for 8 hours. Do not plan to use the system for ANYTHING else while it is running. It will run realistic AVX and handbrake workloads and if it passes 8 hours of testing it is probably about as stable as you can reasonably expect.


If you wish to check stability further you can run 12-24 hours of Prime95 Blend mode or Small FFT.


You do not need to simultaneously run HWinfo or CoreTemp while running Realbench as you should have already performed the thermal compliance test PLUS Realbench will show current CPU temperatures while it is running.


If you run the additional stability test using Prime95 Blend/Small FFT modes for 12-24 hours, you will WANT to also run HWinfo alongside it. Monitor HWinfo periodically to verify that no cores/threads are showing less than 100% usage. If it is, then that worker has errored out and the test should be stopped.


If you find there are errors on ANY of the stability tests including Realbench or Prime95, or any other stress testing utility, you need to make a change in the bios. This could be either dropping the multiplier to a lower factor or increasing the voltage while leaving the multiplier the same. If you change voltage or multiplier at ANY time, you need to start over again at the beginning and verify thermal compliance again.


A more in depth but general guide that is still intended for beginners or those who have had a small amount of experience overclocking can be found here:


*CPU overclocking guide for beginners



.​
how about the aida 64 stress test?
 

packersfan036

Reputable
May 27, 2015
1,620
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Idle temp makes no difference, at all, so long as it is below maybe 45°C, AND so long as your peak temperatures are below 80°C.

So 73°C is within tolerance. However Cinebench is not a useful tool for testing thermal compliance. It is not steady state, it is all over the board. You need a steady state load for thermal testing.

The bigger question anyhow may be, whether it is stable or not.


Quick and dirty overview of overclocking validation procedure.


Set CPU multiplier and voltage at desired settings in BIOS. Do not use presets or automatic utilities. These will overcompensate on core and other voltages. It is much better to configure most core settings manually, and leave anything left over on auto until a later point in time if wish to come back and tweak settings such as cache (Uncore) frequency, System agent voltage, VCCIO (Internal memory controller) and memory speeds or timings (RAM) AFTER the CPU overclock is fully stable.


Save bios settings (As a new BIOS profile if your bios supports multiple profiles) and exit bios.


Boot into the Windows desktop environment. Download and install Prime95 version 26.6.


Download and install either HWinfo or CoreTemp.


Open HWinfo and run "Sensors only" or open CoreTemp.


Run Prime95, either version 26.6 OR the latest version WITH the AVX and AVX2 options disabled in the settings menu that pops up when you start up Prime95, and choose the "Small FFT test option". Run this for 15 minutes while monitoring your core/package temperatures to verify that you do not exceed the thermal specifications of your CPU.


(This should be considered to be 80°C for most generations of Intel processor and for current Ryzen CPUs. For older AMD FX and Phenom series, you should use a thermal monitor that has options for "Distance to TJmax" and you want to NOT see distance to TJmax drop below 10°C distance to TJmax. Anything that is MORE than 10°C distance to TJmax is within the allowed thermal envelope.)


If your CPU passes the thermal compliance test, move on to stability.


Download and install Realbench. Run Realbench and choose the Stress test option. Choose a value from the available memory (RAM) options that is equal to approximately half of your installed memory capacity. If you have 16GB, choose 8GB. If you have 8GB, choose 4GB, etc. Click start and allow the stability test to run for 8 hours. Do not plan to use the system for ANYTHING else while it is running. It will run realistic AVX and handbrake workloads and if it passes 8 hours of testing it is probably about as stable as you can reasonably expect.


If you wish to check stability further you can run 12-24 hours of Prime95 Blend mode or Small FFT.


You do not need to simultaneously run HWinfo or CoreTemp while running Realbench as you should have already performed the thermal compliance test PLUS Realbench will show current CPU temperatures while it is running.


If you run the additional stability test using Prime95 Blend/Small FFT modes for 12-24 hours, you will WANT to also run HWinfo alongside it. Monitor HWinfo periodically to verify that no cores/threads are showing less than 100% usage. If it is, then that worker has errored out and the test should be stopped.


If you find there are errors on ANY of the stability tests including Realbench or Prime95, or any other stress testing utility, you need to make a change in the bios. This could be either dropping the multiplier to a lower factor or increasing the voltage while leaving the multiplier the same. If you change voltage or multiplier at ANY time, you need to start over again at the beginning and verify thermal compliance again.


A more in depth but general guide that is still intended for beginners or those who have had a small amount of experience overclocking can be found here:


*CPU overclocking guide for beginners



.​
also the idle temp fluctuates, moves around, the cpu did not do that at stock. is it normal to fluctuate around?
 

Darkbreeze

Titan
Moderator
Yes, it is normal. Fluctuations, even at stock configurations, should be expected. And the more THINGS you install on your system, the more fluctuations you will see as processes are loaded and unloaded periodically.

Your heater only makes a difference if it is VERY near to your case, or if it significantly raises the ambient temperature in your room.

Aida 64 is no good either. You need to run Prime95, with AVX/AVX2 disabled, Small FFT option. 15 minutes. Exactly as outlined in both my quick and dirty and full overclocking guide.

Here's why, in as short of a description as possible.

Regardless of architecture., Prime 95 works equally well across all platforms. Steady-state is the key. How can anyone extrapolate accurate Core temperatures from workloads that fluctuate like a bad day on the Stock Market?

I'm aware of 5 utilities with steady-state workloads. In order of load level they are:

(1) P95 v26.6 - Small FFT's
(2) HeavyLoad - Stress CPU
(3) FurMark - CPU Burner
(4) Intel Processor Diagnostic Tool - CPU Load
(5) AIDA64 - Tools - System Stability Test - Stress CPU

AIDA64's Stress CPU fails to load any overclocked / overvolted CPU to get anywhere near TDP, and is therefore useless, except for giving naive users a sense of false security because their temps are so low.

HeavyLoad is the closest alternative. Temps and watts are within 3% of Small FFT's.
 

packersfan036

Reputable
May 27, 2015
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Yes, it is normal. Fluctuations, even at stock configurations, should be expected. And the more THINGS you install on your system, the more fluctuations you will see as processes are loaded and unloaded periodically.

Your heater only makes a difference if it is VERY near to your case, or if it significantly raises the ambient temperature in your room.

Aida 64 is no good either. You need to run Prime95, with AVX/AVX2 disabled, Small FFT option. 15 minutes. Exactly as outlined in both my quick and dirty and full overclocking guide.

Here's why, in as short of a description as possible.
ok thanks, so my temps are good then??
 

Darkbreeze

Titan
Moderator
I don't know. You didn't indicate whether you ran Prime95 or not. As I said, Aida is not a good measuring stick for thermal compliance.

If you can download and install Prime95, disable the AVX and AVX2 options on the main page that pops up when you open it, choose the "Small FFT" option and click ok, then run it for 15 minutes without your package or core temps exceeding 80°C, then yes, you are fine. If not, then no, you are not.
 

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