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October 11, 2015, 11:53:24 PM |
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I have been mining with my Antminer S2's at 200M /0725 Volt with the latest version of the factory firmware. To maintain profitability of the S2's I switched to Time Of Use electricity rate... which about 8 months ago, it was $0.05 KW/h.
The power company did some rate plan editing and consolidated the 3 tiers of TOU into a one size fits all plan... of course, that increased the electric rate up to $0.0864 KW/h. Now my Antminer S2's are only breaking even. I have wood heat which is free... I don't need electric heaters.
I just updated the firmware to Kano's latest firmware and I notice some underclocking options, even a -half speed- option.
I'm assuming that there MIGHT be a little bit of an efficiency curve since I notice that the hotter they run, the amperage draw goes up sharply.... if I underclock, the heat produced should go down, as well as the hashrate, however, since the high heat causes inefficiency what does the efficiency look like when its running cooler. I'm wondering is anyone has run the underclocking numbers -- clock speed vs hashrate vs amperage( or wattage )
These are some durable miners in my opinion. I have abused these in a couple office rentals with bad ventilation ( but free electricity ) they just do not want to die... If I can squeeze out some better efficiency and make them again profitable to run, even if its $30 in profit a month, I'll run these till they kroak or it becomes permanently unprofitable. Shoot, $30 / mo is BEER money!
Any efficiency tips would be great..... The cheap offices with free electricity have kinda dried up around here.
Thanks
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