The Samsung CF791_C34F791 is not listed in the Shop | AMD . I've set the deskto settings to FreeSync on, 8bpc, Pixelformat to YCbCr:4:4:4 and Virtual Superresolution off (for obvious reasons)
Occasionally the screen blacks or flickers. It starts to flicker reproducable in Windows 10 when I hit Shift+Win+s for the new snipping tool. it dims the screen which than starts flickering. after a couple of seconds.
AFAK the Samsung supports FreeSync but with FreeSync off there is no flickering.