I wrote little up the same link with another. The one user answear it working perfectly without problems.
AMDGPU - ArchWikiand_Sea_Islands(CIK)_support
HD7950 is of a "Southern Islands" GPU family, and as such supports two different kernel drivers, an old radeon and a new amdgpu . Check the link above on how to force one or another on your card...
recently i installed the driver for 3 radeon vii on an ubuntu server and that was dead easy. i am less sure for this old card tho. thank you all.
There is guide if some place you stuck then we can try go forward.