IMPORTANT! All owners of AMD cards with 6 GB or 8 GB RAM must either keep drivers 20.4.x or lower (do not upgrade to 20.5.1 or later), or upgrade to PhoenixMiner 5.2b or later version to continue mining after DAG epoch 384 (ETC has already passed DAG epoch 384, and ETH will pass it in less than two months).
This means that for
continue mining after DAG epoch 384:
1. If you want to use PM 5.1c you
must either keep drivers 20.4.x or lower (do not upgrade to 20.5.1 or later)2. If you want to upgrade your drivers to 20.5.1+ than
upgrade to PhoenixMiner 5.2b or later version.
Other words:
PM 5.1c didn't mine DAG #384+ with new drivers, for mining with new drivers PM needs be 5.2b or later.
Just try to read more carefully.