Thank you for your reply!
no ,i didn't enabled throttling.
I tried more and found something new.
I changed the mode, I used NAS use GVTg_V5_4 and win10 use GVTg_V5_4 before.
When I promoted NAS mode,it has become more efficient.
This seems to be related to the size allocation ratio of video memory.
here is result:
1、NAS use GVTg_V5_2 and win10 use GVTg_V5_8
2、NAS use GVTg_V5_2 and win10 use GVTg_V5_4
I'm in trouble.
I noticed that:
when I run Synology emby transcoding alone, there is 60fps , the power draw can reach 5W
when VM win10 is running too, the transcoding will fall to less than 20fps, the power draw is limited to 1W each
l also try to run vm win10 alone, the power draw is also limited to 1W。