The 5800 has been physically removed from the pc, and you used DDU (display driver uninstaller) to remove those graphics drivers ?
Post a pic/snip of GPU-Z and also some more detailed INFORMATION REQUIRED WHEN POSTING A QUESTION if DDU doesn't do the trick.
Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T..