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CPU temperature creep up randomly when CPU is idle

Joined
Jan 29, 2012
Messages
12
Motherboard
2011 pro
CPU
i7-4790k
Graphics
ATI HD 6870
Mac
Classic Mac
Mobile Phone
My CPU temperature is normally around 35 when 99% idle. But once awhile (every 20 - 60 minutes), the CPU temperature will increase about 10-15c within 2-3minute. CPU fans will then speed up. After 2-3 minutes, CPU temperature goes back to mid-30 range and fans will then slow down.

This is my setup:
i7-4790K/Gigabyte Z97x-ud3h/Gigabyte ATI HD6870/Cosair H60 cpu cooler
Yosemise 10.10.1
Native CPU power management worked. With the help from ssdtPRGen and freqVectorsEdit, speed stepping works fine (8, 17, 40, 41, 42, 43, 44)
No overclocking

I checked the logs and nothing seems to be logged.
Anyone has a clue why this is happening or how could I trace down the issue?

Thanks!
 
Joined
Mar 19, 2014
Messages
990
Motherboard
Dell XPS 15 7590 - Clover
CPU
i7-9980HK
Graphics
HD 630 + GTX 1650
Mac
  1. iMac
  2. MacBook Pro
Classic Mac
  1. Apple
Mobile Phone
  1. iOS
My CPU temperature is normally around 35 when 99% idle. But once awhile (every 20 - 60 minutes), the CPU temperature will increase about 10-15c within 2-3minute. CPU fans will then speed up. After 2-3 minutes, CPU temperature goes back to mid-30 range and fans will then slow down.

This is my setup:
i7-4790K/Gigabyte Z97x-ud3h/Gigabyte ATI HD6870/Cosair H60 cpu cooler
Yosemise 10.10.1
Native CPU power management worked. With the help from ssdtPRGen and freqVectorsEdit, speed stepping works fine (8, 17, 40, 41, 42, 43, 44)
No overclocking

I checked the logs and nothing seems to be logged.
Anyone has a clue why this is happening or how could I trace down the issue?

Thanks!

See if any processes / application wake up / startup whenever your CPU temps go up, or it may be inadequate fan control. :think:
 
Joined
Jan 29, 2012
Messages
12
Motherboard
2011 pro
CPU
i7-4790k
Graphics
ATI HD 6870
Mac
Classic Mac
Mobile Phone
Ya, I think there was an issue on how I connected my H60 cooler to the motherboard. Yosemise is not the one to be blamed.
 
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