A couple of days ago when Valve revealed the specifications of the 300 Steam Machine prototypes one of the things that stuck out a bit is that all machines have an Intel CPU in combination with an NVIDIA GPU. However, responding to a press inquiry Valve's Dough Lombardi revealed that they do not have an exclusivity agreement with Intel or NVIDIA. When the final Steam Machines arrive in 2014, these systems will come with chips from AMD, NVIDIA and Intel.
The answer: no, it hasn't. Responding to an email query from Forbes, Valve's Doug Lombardi explained: 'Last week, we posted some technical specs of our first wave of Steam Machine prototypes. Although the graphics hardware that we’ve selected for the first wave of prototypes is a variety of Nvidia cards, that is not an indication that Steam Machines are Nvidia-only.
'In 2014, there will be Steam Machines commercially available with graphics hardware made by AMD, Nvidia, and Intel. Valve has worked closely together with all three of these companies on optimising their hardware for SteamOS, and will continue to do so into the foreseeable future.'