Depends on hardware....

@Op - Best to do your own research as anyone with half a brain cell that's making a higher than average profit in this day and age would be shooting themselves in the foot ringing a bell to tell others where there's profit....you jumped in the game to mine, so put in your big boy/girl pants and do the research of a miner...in RL no one hands you a map and say go here and dig you'll find gold....have to do research and test drill till you strike pay dirt.