You should be fine using the same drivers. If you do want to reinstall, you should first make sure have the driver you want to use downloaded, then remove the drivers through control panel/AMD uninstaller, then reboot to safe mode, run Driver Sweeper/Driver Fusion to clean out registries/left over bits, then run CCleaner in registry to do the same, then reboot, and install the drivers you want again.
But, no, you should be okay with current drivers.