s3's are cheap used. I am in NJ USA if you are close to me I have 2 s3's they will do freq 212 each .
you get 830 gh to 850 gh using 680 watts
I was unaware that they could reach that before I let mine go.
Hind sight I guess.
two machines 415 to 425 each using 340 watts each. they total to 830-850 gh using 680 watts
A really good s-3 can do a little over 505gh and use about 390-400 watts
2 good ones can do 1010gh at 780-800 watts.
mine are batch 1 thus 2 do 830- 850 watts
s-3's can sell for 100 bucks, pretty good if power is free.