Hey all,

Are there other types of coins that are profitable?

I have a quad core 2500k processor overclocked close to 4Ghz, and an Nvidea geforce gtx 560 GPU - would this generate anything on its own?

Let's say I upgrade my power supply and getting a second GPU, how much litecoin could you estimate me earning? How about if I had 4 of the best GPU's? Is there profit to be made?

NOTE: I DON'T PAY FOR ELECTRICITY - OPEN TO IDEAS FOR THIS (Litecoins?)

Thanks!