I don't know, but it is inferior to the S or "Slim". Less USB ports, no Toslink, no S-video support, no Component support, and no VGA support. The motherboard has the same 45nm CPU and GPU on a die, so cooling won't be much better. Still has one cooling fan. And still has the same bad disc drive. The only reason for it to be released was to match the look of the Xbox One.