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Task Manager reporting wrong CPU frequency

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31 replies to this topic

#31 omganinja

omganinja

    Neowinian

  • Joined: 02-June 07
  • Location: Brisbane, Australia

Posted 04 January 2013 - 04:19

Atleast yours is going few Mhz above rated speed, Mine goes almost 1 Ghz above in task manager. :laugh:

The funny thing is, my CPU is clocked at 3.2Ghz, so all figures are incorrect.


#32 +LogicalApex

LogicalApex

    Software Engineer

  • Tech Issues Solved: 8
  • Joined: 14-August 02
  • Location: Philadelphia, PA
  • OS: Windows 7 Ultimate x64
  • Phone: Nexus 5

Posted 04 January 2013 - 04:28

More than likely, the Windows CPU read doesn't read the chip speed in real-time, as CPU-Z does. Instead it must take a limited number of parameters and run them through an algorithm to guess the current operating speed of the chip. The real question is why would they need to do this? CPU-Z does it in real-time so why not do the same? It is possible that this data is being fed in real-time in places like Performance Monitor and they are hoping to reduce load on the CPU by not polling constantly?

Either way, it isn't correct and is a bug the should be fixed.

I'm not sure what the other users can't seem to understand in this thread. Talks about TurboBoost and SpeedStep are pointless when CPU-Z is always reporting the current CPU operating speed, including TurboBoost dynamic overclocking and SpeedStep dynamic underclocking.Sometimes I wonder if people just post for the sake of posting...