Sell the 2gb gpu and add more cash for a better mining experience, you won't be able to make good profits mining with 2gb gpu and moreover no profitable coin for 2gb memory right now, unless you want to mine new coins? There is a catch here too, new coins are mostly crap jobs, they might not get listed for a very long time and you will be forced to hold the coins, the worst part is some will never get listed on exchange