Bizarre clock speed and utilization reported for Core2Duo in task manager

Mzero

New Member
Windows 10 task manager reports that this Core2Duo E8400 is running below its max. frequency and below 100% utilization, even though the power profile is set to high performance and the system is loaded with Prime95. Thermals are OK, no throttling. HWinfo reports the expected clock speed but it also reports a lower than expected utilization for some but not all utilization figures.
If the multiplier and bus clock reported by HWinfo is correct, then the clock speed in task manager is impossible.
Tried disabling EIST/C-states in BIOS, no change in results. Debug log attached.
 

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Task Manager also reports a different kind of utilization called "Utility". This is also reported by HWiNFO.
 
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