hmmm is it worth it to do so much now considering the low profits. This should have been done from the start. Best is to have low electricity + hire someone to get custom software to undervolt + higher efficient PSU. I bet the S9 can undervolt too. We just dont know how lol. Btw, u did mention u made tons off your gpu miner. However, did u check the price of eth when u purchase the gpu and when u have broken even. It should have gone up a few times at least. I believe best would be a niche type of miner that breaks even in 2 months. Breakeven fast is important. Profitability can drop after, is fine.