Everyone has to overclock/underclock in order to max the profit,...most of the miners love to push the cards to their limit,...i personally love to find the perfect balance for each card,...ideal performance/watt ratio,...but in both scenarios you need a stable miner, which is flexible for stock and overclock/underclock settings,...it has to be stable otherwise it's no good,...that's the main reason I'm still sticking with ewbf,...because it's unstable on higher clocks,...but it has a good potential