I use 5.4c and amd 20.4.2 on win 10. with a single rx 5600 xt board everything goes ok. when I put more boards rx 5600 xt windows falls. any idea? thanks

IMPORTANT! The latest Nvidia drivers for Windows 10 460.79 and 460.89 cause crash when PhoenixMiner starts. If you want to use these drivers, you need to upgrade to PhoenixMiner 5.4c or later version.

IMPORTANT! Ethereum Classic (ETC) network switched to a modified version of ethash, called ETCHash. If you are mining ETC you must upgrade to PhoenixMiner 5.3b or later, otherwise you will get only rejected shares when mining ETC.

The current ETC DAG is 195 instead of 390, with corresponding "shrinking" of the DAG buffer to about 2.5 GB. With this DAG size you will be able to mine with 3GB and 4GB cards without problems. After that, each DAG epoch on the ETC network will be twice as long, so the DAG size will grow with half the speed as before. As a result, it will be possible to mine ETC with 4GB cards for about 4 more years.

The switch went without problems, all our test rigs switched to the new DAG and are mining normally. You may need to run auto-tuning again if to get an optimal speed with the new DAG size.

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 5.2e or later version to continue mining after DAG epoch 384 (ETH will pass it before the end of 2020).

IMPORTANT! All owners of AMD cards with 4 GB RAM must upgrade to PhoenixMiner 5.2e or later version to continue mining after DAG epoch 373. Additionally, here are some important tips for longest possible usage of 4 GB AMD cards with PhoenixMiner 5.2e and later: