1. http://bitcoinweekly.com/articles/the-wasted-electricity-obj...
2. http://bitcoinweekly.com/articles/the-wasted-electricity-obj...
So at a guess, the network is doing now around 7MW of electrical power, although there is room for a lot of efficiency improvement.
1. http://bitcoinweekly.com/articles/the-wasted-electricity-obj...
2. http://bitcoinweekly.com/articles/the-wasted-electricity-obj...