Intel i7 8700k, Frequency, Constant Change

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Seabass101

Seabass101

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Jan 18, 2016
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Hi, I wanted to ask why dose my i7 8700k keep changing core frequency so often?

I am looking at HW Monitor and CPU-Z and see that my CPU goes from 900MHz to 4.7GHz and changes Frequency in between constantly on Idle...why?

Core Voltage: Between .6v and .9v
When changing frequency constantly

Is this normal for CPU on Idle to go up and down on Frequency constantly?

Also, I only have Chrome open nothing else and Power Mode is on Balance with min CPU at 10% and max at 100%

Motherboard Bios settings are at Standard

Thanks
Comments Much Appreciated
 
Solution
C
Does the frequencies go up and down while your gaming or does it stay around the same clock speed? I know my FX 6300 will stay at 3.8 ghz while I'm gaming, but if its idle it will go from 1.4 to 3.8 ghz, and that is only happening because of background process, causing the processor to change frequencies based on what it needs. If you are not seeing any drastic frequency change while gaming or any heavy workload applications than you are fine and nothing wrong with you cpu, if you are seeing frequency changes while gaming or heavy workloaded applications, than you have an issue
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connerweatherly17

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Sep 15, 2017
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Does the frequencies go up and down while your gaming or does it stay around the same clock speed? I know my FX 6300 will stay at 3.8 ghz while I'm gaming, but if its idle it will go from 1.4 to 3.8 ghz, and that is only happening because of background process, causing the processor to change frequencies based on what it needs. If you are not seeing any drastic frequency change while gaming or any heavy workload applications than you are fine and nothing wrong with you cpu, if you are seeing frequency changes while gaming or heavy workloaded applications, than you have an issue
 
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CompuTronix

CompuTronix

Intel Master
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Nov 13, 2006
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Seabass101,

Core temperatures increase and decrease instantly with changes in load.

Intel’s specification for Digital Thermal Sensor (DTS) response time is 256 milliseconds, or about 1/4th of a second. Since Windows has dozens of Processes and Services running in the background, it’s normal to see rapid and random Core temperature “spikes” or fluctuations, especially during the first few minutes after startup, which should eventually settle. Any software activity will show some percentage of CPU Utilization in Task Manager, where unnecessary Tray items, Startups, Processes and Services that contribute to excessive or continued spiking can be disabled.

6th Generation processors introduced "Speed Shift" technology in Windows 10, which responds much faster to changes in workload than "SpeedStep" due to having many more Core speed and Core voltage transition levels.

Since 7th and 8th Generation Speed Shift is twice as fast as 6th Generation, some users complain of Core temperature spikes which cause fluctuations in fan RPM at idle. Motherboard manufacturers are currently developing BIOS fixes that include separate SpeedStep and Speed Shift settings with more flexible fan curves and time delay options.

Also, the default setting for Minimum processor state is 5%.

You might want to restore that setting.

Here's the operating range for Core temperature:

Core temperatures above 85°C aren't recommended.

Core temperatures below 80°C are preferred.

Core temperatures increase and decrease with Ambient temperature.

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

CT :sol:
 
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