Hello,

I can get 400 watts of free electricity.
I've been mining for one year with a miner at 270Gh/s. It has a 1.4 W/Gh/s ratio.

I'm wondering if I can get a miner with a better W/Gh/s ratio and that uses a maximum of 400 watts (or that can be underclocked to use less then 400 watts).
What would be the best miner, new or second hand, available in Europe ?

Thanks,
mat542