Cryptonight. I wont reveal which one Im mining but lets just say Im merge mining 2 coins at once. 1 HD 7850 1GB, 1 R9 270X 2GB, 1 RX 580 8GB. ~$0.50/day.

Ether-1 is a good ethash coin for 2GB cards, I just didnt get as good as profits as having both cards doing the same algo (7850 cant run ethash, only 1GB)