Thank you for the helpful steps and the recommendations. I’m happy to report that installing the AMD Adrenaline 24.8.1 driver was exactly what my system needed. Only thing I did different was directly download the EXE (here) and let the installer install it. Once the lower version driver was installed, it seems the AMD driver worked seamlessly with my upgraded memory.
Unfortunately, the Bios flashing would not work – though it read fine from the USB, once it got to the BIOS screen it reported it could not proceed due to “corrupt” or invalid binary. However, since I have a later BIOS installed and it is working fine with the system currently, I don’t see the need to do anything further with the BIOS.
Let me know if you have further information, but all the issues I had have apparently dissipated. Thanks for your help!