”Although the graphics hardware that we’ve selected for the first wave of
Steam Machine prototypes is a variety of Nvidia cards, that is not an indication that
Steam Machines are Nvidia-only,” a Valve spokesman said in a statement this week.
“In 2014, there will be Steam Machines commercially available with graphics hardware
made by AMD, Nvidia, and Intel. Valve has worked closely with all three of these
companies on optimizing their hardware for SteamOS, and will continue to do so
into the foreseeable future.”