My hashrate is 0 Mhash/s... and I have four Titan cubes. Arrrrrrrrrrrgh. HWSTATUS is "OFF" for all!
That was mine. Ribbon cables were backwards... I think they were mfr'd in error. The controller side is keyed. Pictures online show them going AWAY from the controller but the one's I have go to the MIDDLE of the board. So I had to switch the cable on the cube side so that the ribbon cable first went INTO the cube.
I am curious now... is that the way it is for everyone else or did I just get a reversed set of ribbon cables?