I'm also curious about GPU mining. I understand that a GPU needs 2gb or more at this point but I don't know much more than that. Support for ETH seems shaky - no real mining calculators, etc.
Actually you need at least 4g card to mine eth because of the dag file size , and it's not smart move to learn about etherum mining now when it's going to POS ,ppl who want to get in gpu mining should wait now for the etherum and vega to see what will happen thats my opinion.
What they said.
Although if you're really chomping at the bit, I'd say look into Nvidia and equihash/Lbry. The cards will have higher resale, so there's less capital risk, and if/when Ether goes POS Nvidia cards will still have a hashing advantage, even though the pools will saturate with former AMD eth miners.