BitFury were apparently spending around $100M on a new mining data centre[0] so I would imagine cost would be in excess of this. There was also a discussion at

BitFury were apparently spending around $100M on a new mining data centre[0] so I would imagine cost would be in excess of this. There was also a discussion at https://news.ycombinator.com/item?id=10774204 https://news.ycombinator.com/item?id=10774204 with some estimated numbers. [0] http://www.coindesk.com/bitfury-details-100-million-georgia-data-center/ http://www.coindesk.com/bitfury-details-100-million-georgia-...