Good afternoon fellow miners,
Living in Japan where the price of power is around 29 cents per kilwatt, I've learned to conserve power using my 6 GPU rig. Effectively dropping power consumption from 1200 watts to 800 watts, saving over $100 dollars in power and only losing 5% of my hashrate.
The nice part about ethereum mining is the fact that the hashrate is based on the gpu memory and not the base clock. Normally on the GPU the base clock is what uses most of the power, so(for example) you can underclock the base clock on a GTX 1070, and overclock the memory by 500, effectively getting the same hashrate as before and reducing the power by 30-40 percent.
Steps to lower the power on a GTX 1070 from 150 watts to 85 watts with 29h/s:
1)Download MSI afterburner
2)Reduce base clock by 200 points(see picture)(this is the big power saver)
3)overclock the memory to around 500, depending on the memory(one of mine can do 550),
Honestly raising it higher then this seemed to just increase the power consumption and with minimal change to
hashrate
4)undervolt(power meter, not voltage) all the way down to 0
Congratulations! You should now have a hashrate of 29, while using 50% less power
Note: this screenshot was taking in the scorching heat, which is why the power consumption is at 950. Also, I don't have to use any extra fans because lowering the power requirements also drastically lowers the heat created! My GPU's run at 65D Celsius in 32 degree weather!
If this saves you a pretty penny feel free to read my other blog posts :)
See my other blog regarding steps to get better power consumption for the 470's