Ethereum DAG size predictions
The DAG started at 1 GB at the time of the Frontier launch, and increases by approximately 0.73x per year. Current size is about 1.80 GB as of mid-November 2016.
- The 2GB limit will be reached December 2016
- The 3GB limit will be reached April 2018
- The 4GB limit will be reached September 2019
However, it’s likely that the switch to PoS will occur long before then.
Some GPUs will need the DAG to be uploaded in chunks. You should search then for Genoil chunked ethminer.