Firmware updates for USB controllers and a new driver have recently been released.
After installing a fresh firmware version and a fresh driver, I observe stable consumption of one core of the order of 80% and another core of the order of 50% in idle time.
I tried reinstalling Windows 11 24 H2 (downloaded the iso from Microsoft's website, without any modifications).
On a fresh system without drivers, CPU consumption is lower, but there also seems to be a small consumption (about 10% of one core and 5% of the other).
