He means that you shouldn't be minig bitcoins with it and is right. You will need asic miners for bitcoin. You can mine altcoins with the setup you have. Btw the only thing that really matters is your gpu and the owner it costs to run it. Your CPU and Mobo and everything else just needs to be sufficient enough to support the you you are using that's all. Your setup is fine and it is a nice gpu to mine a fairly decent amount. If you get into it I suggest on buying more gpus unless you mine most of the day with this setup and it's more of a lucrative hobby then anything else.