At current clock, 143w. Fan uses ~7.5W, Rpi uses ~7.5w, so ~128 for the actual miner, not bad. Power consumption will be significantly better on the controller models, as the pis are not configured to change voltage, as well as beta software.
I thought BA said they would be at 75 watts for 100 GH/s? Was this not achieved?
EDIT: That is what they are still offering on their website, will there really be that big of a difference with their own control board?
The controller board is needed to control the voltage, so yes. Also thats 75w @ 100 for the X3 not the X1. Fan + pi is a significant overhead for the X1, uses 16W while CGminer is not functioning