Hello,
Our development efforts have been focused on levaraging the powerful AMD GPUs rather than CPU as we get much better results.
This however is for newer generation products based on the DisplayLink DL-6000 series.
The driver is designed to use what is available to reach comfortable framerate and latency.
If you have actual numbers of usage (screenshot of task manager will do) with the description of the use case, I can see if that's a normal range or if this is abnormal.
We are in discussion with Microsoft about something different but that be what your issue may actually be.
30130: CPU fan usage has increased between Windows 10 RS3 and RS4+ (v1709 to v1803+), but the work has been multi-teams and doesn't progress as quickly as we would like or need.
Kind regards,
Alban