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Old 08-08-2019, 08:43 AM   #12
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AlbanRampon's Avatar
Join Date: Sep 2015
Location: Cambridge, UK
Posts: 1,597

Hello Kevin, stvlada,

We have sourced a machine identical to stvlada.
From what we can see, the CPU usage is not high, nor is it significantly different than on the previous version of Windows 10. The difference in CPU load is marginal. The results observed in our labs are in line with screenshots received from stvlada.
What has visibly changed is that Microsoft added a label in Task Manager, and that label says high... but nothing else is running, and computing any pixel and encoding them does cost some resource, whatever the connection mode and whether you can see it in Task Manager or not. On my machine, yesterday I saw Task Manager as High on that label at with 4% CPU, leading us to believe that that label shows relative power, not absolute power.

The problem we see is the fan change, despite the lack of significant change of CPU load between these versions of Windows 10.
The fan is supposed to be controlled by temperature. Temperature tends to come from computing load, from total power usage (not relative to other apps).
We don't yet understand why the fan behaves very differently, when the load is similar. It suggests there's something else.

The next step is for us to consult with Microsoft for advice on profiling what triggers the fan: is there a load invisible in Task Manager, is the marginal CPU difference really warrant that fan impact, is there another component counted in that power label, or something else...

Kind regards,
Alban Rampon
Senior product manager, universal docking stations and accessories
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