you can choose either install without uninstall or just install, because, the setup itself will uninstall previous driver , as in my method, just run the installer and updated to latest

damn it, this 7.4 killing my gameplay experience, i've got jerkiness in my gameplay, seems like every movement i made, there'll be a lag... well, not too sure if 7.4 cause the problem, but after i install 7.3, it's gone...