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I've got a Dell Inspiron 11, model 3147, with a Pentium N3540 2.16GHz processor.
I've noticed that when I chose the "high performance" power plan (at Control Panel\All Control Panel Items\Power Options), the CPU will immediately go to 100% usage in task manager, and 125% usage in resource monitor. If I change it to "balanced," it will immediately go back down to below 50%. This happens when I have nothing running except task manager and resource monitor.
When at 100% CPU usage, the processes consuming max CPU don't seem to make any sense. For instance, task manager itself will sometimes show as consuming over 50% CPU.
I have run a scan with Windows Defender and didn't find any malware.
The computer seems responsive despite showing 100% CPU usage.
Is it expected that a Pentium N3450 will run at 100% CPU when in "high performance" mode? Or is there a problem with my laptop?
Below is a screengrab of task manager showing 100% CPU usage.
Josh
Posted 2016-02-15T13:02:21.730
Reputation: 165
Sounds more like you're seeing the CPU frequency staying at "100%", maybe a weird hardware setup, bug, etc? – Xen2050 – 2016-02-15T13:07:38.947
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install the WPT (part of the Win10 SDK: https://dev.windows.com/en-us/downloads/windows-10-sdk), run WPRUI.exe, select first level and under resource CPU usage. Now click on start, capture 1 minute of the CPU usage. Now compress the larger ETL file as 7z/RAR, upload it to OneDrive, create a share link and post the link here. I'll see analyze it and look why DWM and system cause such a high CPU usage
– magicandre1981 – 2016-02-15T17:21:05.570