You can’t use a 3gb card for eth
Why not?
And do you have any suggestions on what I can mine (profitably) with my setup?
Eths DAG file which the gpu must put in its Vram is bigger than 4GB now and growing.
You can do ETC, Ergo, VTC, CCX, BTG. Just has to be a coin with algo that still works on only 3gb or less vram.