Cedric, the first carbon computer

The first computer built entirely with carbon nanotubes has been unveiled, opening the door to a new generation of digital devices. "Cedric" is only a basic prototype but could be developed into a machine which is smaller, faster and more efficient than today's silicon models. Nanotubes have long been touted as the heir to silicon's throne, but building a working computer has proven awkward. The breakthrough by Stanford University engineers is published in Nature. Cedric is the most complex carbon-based electronic system yet realised.
 So is it fast?