Make sure you verify your game files in Steam.
I would remove all 3rd party overclocking tools and do a fresh driver install as follows.
I suggest you go here: Official Display Driver Uninstaller DDU Download
Download DDU.
Download the version of AMD Driver you want to install.
Disconnect from the Internet completely.
Boot into safe mode.
Run DDU and uninstall all traces of previous AMD Driver. Also run Nvia Driver uninstall if you had an Nvidia GPU Previously.
Reboot into normal mode, making sure you are still disconnected from the Internet.
Run the AMD Driver installer.
Reboot.
Then and only then reconnect to the Internet.
Good luck.