Valve will finally let you build your own Steam Machine with SteamOS for desktop Valve is making SteamOS compatible with desktop hardware, allowing users to build their own Steam Machines. While initial compatibility is with AMD and Intel, Nvidia support is in development and requires close collaboration with Nvidia. The current installation process is for fresh installs and requires wiping the drive, with dual-booting functionality not yet available.

• Valve is enabling users to build their own Steam Machines using custom PC parts.
• SteamOS 3.8.10 includes improved compatibility with Intel and AMD platforms.
• Valve is working on adding Nvidia graphics support to SteamOS, collaborating closely with Nvidia.
• Nvidia support may not be available this year but is being worked on.
• The current SteamOS installation requires wiping the drive and does not support dual-booting.
• DIY Steam Machine builds are now an option for those not wanting to wait for reservations. Continue reading https://www.theverge.com/games/953411/valve-steamos-desktop-nvidia