- After the epoch 373 the hashrate will drop dramatically (to just a few MH/s) because the DAG no longer fits in the card's VRAM and part of it is stored in the system memory. Use the option -daglim 1 to use only 4006 MB for the DAG buffer. This will allow you to mine for several more weeks with gradually lower hashrate for each passing DAG epoch. If the speed is too low (less than 10 MH/s for epoch 374), you need to use -daglim 4000, or even lower value - keep trying with lower and lower -daglim values until the speed jumps higher. Note that this value can be different for each card but as a general rule of thumb, if you are able to mine without problems and speed loss on epoch 373, -daglim 1 should work fine. To allow higher -daglim values, you also need to add -dagrestart 1
- Note that -daglim will only work on Polaris GPUs (RX470, RX480, RX570, RX580, RX590), and the PhoenixMiner 5.2b is still in alpha stage of testing
- It is also important to use auto-tune (do not specify -gt values) because the optimal -gt value may change with each new epoch, and will definitely be different than before.
- You can also try the new option -rxboost 1 for additional increase of hashrate
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).
