It works now, I got 8-10W instead of 15-16W!hi! i have the same model and problem has gone (radeon high side is about 5-10W)
1. check that you have installed all updates to beta 7
2. it works better in "low battery mode" - try to activate it (System settings - battery - power saving mode)
Switching power saving mode helped!
Why could not they do this earlier?)))