There is alot of coins to mine out there however the profitability is much lower. Go to www.whattomine.com and put in 180MH/s and 800Watts. Also put in your power bill, assume $0.10/kwh.

So with ETH and ETC you earn a profit of $1.45 a day or so. If you mine another other coin that those then the max profit you make is $0.15 with QuarkChain. Every other coin is a loss. Maybe if your power is very cheap like $0.05 kwh you can make something decent but barely.

Reason why is that many GPU <4GB are probably mining those coins also since they can't mine ETH or ETC.