KDE Plasma on a Radxa Rock 5b with 16 GB Ram ARM device. Installed on a Samsung 970 EVO Plus 250 GB NVME.
Power usage at the wall receptacle =
6 Watts at idle with the NVME
4 Watts at idle with a 128 GB micro SD card.
Fastest ARM device I have installed so far.
Pudge
EDIT:
Fixed messed up screenshot