Public service reminder to always uninstall your drivers cleanly before installing new ones. When I installed the 14.9.1's it did fix my 2k issue, but it also broke the Catalyst Control Center (the app that has all the different options for driver-level graphic quality, among other things). It's working now, but only after I had to uninstall the whole package and re-install.
This isn't the first time that's happened with the CCC, either. I really ought to know better.

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