i7 9700K temps and voltage

[Blazter]

Hi!

I have a i7 9700K stock with a Noctua NH-D15 running on a Asus TUF Z390-Pro Gaming (as in sign).

When running Prime95 Small FFTs my i7 9700K would throttle down after a while with temps around 85C. I tried the following settings which helped the throttle:

CPU Core/Cache Current Limit Max to 255.50
Long Duration Package Power Limit to 4095
Short Duration Package Power Limit to 4095

Then when running Prime95 the CPU would not throttle but the computer restarted itself after the CPU went above 93c. I saw that the CPU voltage would exceed over 1.33v.

So I changed the voltage to manual. Prime95 gave me errors until I hit 1.275v. Now the CPU wont throttle and it can run Prime95 with max 88c and the computer wont restart itself.

When idle my CPU temps are around 30c and when gaming its around 60c (Battlefield 1) and around 48c (Deus Ex: Mankind Divided).


My questions are:

Should I remount the NH-D15 or are the temps normal?

Why do I need so much CPU voltage? Something else I should alter so I can run with lower voltage?

How are the temps for those of you running the same CPU with NH-D15?

Thanks!

 

[Rodrigodrt]

Perfectly fine gaming and idle temps, prime is hot so seems like thats right also. So, 1.275v? depends on how much you overclocked, whats your current ghz with those settings?

 

[Blazter]

Thank you for the reply! Good to hear

About the voltage, thats the thing, Im running it at stock 4.6GHz (4.9GHz turbo). Prime95 will give errors if I lower the volt.

 

[CompuTronix]

... 9700K stock with a Noctua NH-D15 ... Prime95 Small FFTs ... temps around 85C ... went above 93c ... voltage would exceed over 1.33 ... changed the voltage to manual ... hit 1.275v ... can run Prime95 with max 88c ... idle ... around 30c and when gaming its around 60c ...

(1) Should I remount the NH-D15 or are the temps normal?

(2) Why do I need so much CPU voltage?

(3) Something else I should alter so I can run with lower voltage?

(4) How are the temps for those of you running the same CPU with NH-D15? ...

Blazter,

Q: Which version of Prime95?
Q: What is your ambient temperature?

(1) Your NH-D15 is most likely TIM'd and mounted OK.

(2) No two processors are identical; each is unique in voltage tolerance and thermal behavior. Vcore above 1.4 is considered high for 14 nanometer processors, so 1.33 and below is fine. Here's the maximum recommended Core voltages per microarchitecture from 14 to 65 nanometers since 2006:

(3) Load/Line Calibration (LLC) and memory XMP affect Core temperature, so it's best to use manual settings.

The LLC setting should be adjusted so Vcore at 100% workload closely matches (but doesn't sag below or spike above) the Vcore setting. A slightly lower setting is better than slightly higher, but deep sags can cause crashes. Similar to finding minimum stable Vcore, optimizing LLC is a trial and error adjustment.

Intel's specification for maximum supported memory frequency is 2666 MHz for your processor: Intel® Core™ i7-9700K Processor - https://ark.intel.com/products/series/134907/9th-Generation-Intel-Core-i7-Processors

Running memory frequencies above spec forces the memory controller within the CPU Die to also run above spec, meaning "overclocked", which in turn increases Core temperatures up to 4°C.

Here's the nominal operating range for Core temperature:

Core temperatures above 85°C are not recommended.

Core temperatures below 80°C are ideal.

Core temperatures increase and decrease with Ambient temperature.

Idle temperatures below 25°C are generally due to Ambient temperatures below 22°C.

Gaming generally averages around 55°C, yet can range from 40°C to 70°C or more, depending on how a particular gaming title allocates CPU / GPU workloads, as well as differences in cooling performance and Ambient temperature.

(4) Since many hardware, software and environmental variables are involved in comparing Core temperatures among other users running the 9700K with an NH-D15, in order to acquire meaningful information, everyone should at least provide:

• Ambient temperature
• Test software

“Stress” tests vary widely. Intel tests their processors at a steady 100% TDP workload to validate Thermal Specifications. Utilities that don't overload or underload your processor will give you a valid thermal baseline. Here’s a comparison of utilities grouped as thermal and stability tests according to % of TDP, averaged across six processor Generations at stock settings rounded to the nearest 5%:

All tests will show 100% CPU Utilization in Windows Task Manager, which indicates processor resource activity, not % TDP workload. Core temperatures respond directly to Power dissipation (Watts), which is driven by workload.

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

CT

 

[TomasKorbel]

Wow nice,
My i7-9700k was running at 80-90°C at stocks speeds (NH U12P SE2)while gaming (Blackout), so i decided to run hwinfo and Vcore max was like 1.35-1.4V so thats pretty high i guess, so i set manually Vcore to 1.25V and now its sitting on 65-75°C,

Maybe its time to upgrade cooler and case ? I have old cooler master 500 with [strike]sxxxxy[/strike] [poor] airflow and when graphic card reach 75°C its pretty damm hot in case

 

[CompuTronix]

Once again please; what is your ambient temperature, and which version of Prime95 was used?

 

[Blazter]

Wow, thank you CompuTronix for the detailed answer! My ambient temperature are around 23C and the version of Prime95 is 29.4 BUT Asus had released a new version of BIOS and now I could lower my voltage to 1.175 and it resulted in a temperature of max 76C running Prime95 😀 Have not tried gaming yet though but it should be lower than before also

Edit: I got a blue screen running 3dMark so the voltage is now 1.200v which works fine after several tests. Prime95 gets the CPU to 79C with this voltage

 

[CompuTronix]

... ambient temperature are around 23C ... Prime95 is 29.4 ... voltage is now 1.200v ... Prime95 gets the CPU to 79C ...

Standard or "normal" ambient temperature is 22°C or 72°F, so you're at a good ambient temperature for thermal testing.

Sorry you missed the memo, but do not use any Prime95 versions later than 26.6. This is a known issue which is explained the Temperature Guide I linked for you. If you look at the upper left corner of the scale I posted showing %TDP workload, you can see that later versions impose the most extreme workload of any utilities.

4th through 9th Generation i9, i7, i5 and i3 CPU’s have AVX2 Instruction Sets. Prime95 versions later than 26.6 run AVX/2 code on the CPU's Floating Point Unit (FPU), which is an unrealistic workload that can cause your processor to run at Core temperatures up to 20°C higher.

Many 6th through 9th Generation motherboards address the AVX problem by providing “offset” adjustments (downclock) in BIOS. -3 (300 MHz) or more may be needed to limit Core temperatures to 85°C. Even if you don’t use AVX apps such as for rendering or transcoding, BIOS should still be configured for it, as certain utilities use AVX for stability testing.

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. As per Intel’s Datasheets, TDP and Thermal Specifications are validated “without AVX”.

Prime95 v26.6 Small FFT’s provides a true and steady 100% workload. No other utility so closely replicates Intel's proprietary workload test conditions. If your Core temperatures are below 85°C on Prime95 v26.6 Small FFT's, then your processor should run the most demanding real-world workloads without overheating.

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

Give it a try.

CT

 

[Blazter]

Thank you once again. Really helpful information! No wonder my computer restarted itself when I took away its abilities to downclock itself running later version of Prime95 with voltage on auto 😛