Update, I'm wondering if my issues were related to this:
I haven't rolled back the update but I do recall this occurred after windows updates were applied.
Same problem here : big FPS drops with Freesync activated it is clearly visible on GPU activity reported by Amd WattMan : see the screenshot below
In my screenshot, you will see I tested the full screen mode inside the red zone (and then I used the windowed mode - visible outside the 2 red zones)
FPS drops from 90 to 35 fps every second ! at the same time the activity drops from 100% to 0% every second
My example is in the game : Black Desert Online - Full screen mode
Please AMD fix this in drivers !
GPU : RX480 4G
Screen Acer XF240H Freesync activated, 144hz
All my settings are by default. I have activated Amd WattMan ONLY to SEE the temparature/activity/frequency curves
Please AMD FIX THIS
this is a well know problem on your forums theres many serious topics about it !
I made a video that clearly indicate how to reproduce this see it on youtube AMD RX480 Fps drop in fullscreen is insane! please amd fix this! - YouTube
This is unacceptable that Amd respond in modifying the default settings !
Then you admit that the default settings are not working
All the releases since 16.12.2 are affected