Traditional miners stop mining Ethereum on AMD GPUs with 4G memory as the size of DAG becomes too big for them.
Bminer supports loading parts of the DAG so that the GPUs can continue to mine Ethereum. You can specify the size of the partial DAG through the -ethash-allocation
parameter.
For example,
bminer -uri ethproxy+ssl://0x6D2a79507C67A8ACBc01D16a4858469677792C39.worker@eu1.ethermine.org:5555 -ethash-allocation 4081
You can use 4080–4090 for typical AMD 4G GPUs. Larger allocation leads to better performance although Bminer might fail due to out of memory errors. Bminer optimizes on top of the AMD driver to utilize more device memory to deliver better performances.
Please see https://www.bminer.me/releases/ for more details.
Happy mining!