Up until not long ago Ethereum (ETH) and in general most of Ethash AMD and Nvidia GPU mining was mostly done with Claymore’s Dual Ethereum AMD+NVIDIA GPU Miner v15.0, but unfortunately the miner stopped working as it had support up to DAG Epoch 384 for Ethereum. Furthermore, Claymore, the developer of the software has apparently disappeared or at least has stopped updating his software, so miners had to go for alternatives. Currently the most popular miner that has succeeded Claymore’s miner is PhoenixMiner, but Claymore’s miner is not entirely dead yet. Enter the user Justaminer on Bitcointalk, who has apparently modified Claymore’s miner without having access to the source code in order to make it work once more.
Just_a_miner’s modification called More Epochs mod for Claymore ETH Miner v15 brings support for DAG epochs 385 and later to the miner, so that you can continue using it. The only difference is that the 1% development fee will not go to Claymore anymore (it cannot because his miner is not working anymore), but to Just_a_miner who has revived the Claymore miner back from the dead and will hopefully keep it working on the long run. His modification brings support of DAG epochs up to 500, fixes bugs of the original miner such as restoring access to nvml.dll on Windows 10, adds support of new Nvidia drivers 460.89+. So, it is not just a modification to enable support for newer DAG epochs, but other issues of the original miner also have been addressed. Currently this mod supports only the Windows version of the miner and is targeted at Nvidia GPUs, however there is also test support of several AMD Radeon GPUs: RX 470, RX 480, RX 580, Vega and Navi. The latest version of the Claymore mod from Justaminer is 1.4, so make sure you download and that one and not an earlier version.