Does this board have any onboard graphics / does this card still have basic funtion w/o drivers? It looks like the installer did a poor job of removing the old version of the driver.
Forcing uninstall of AMD Catalyst(TM) Proprietary Driver.
No integrity verification is done.
restore of system environment completed
Errors during DKMS module removal
Try uninstalling the old driver via whatever means you installed it (make, or repo) and then try installing the new driver again.