SteamOS or Bazzite: choose the software before you buy

Choose the operating system before you order the parts. The graphics card matters, but so do your games, TV, controller and tolerance for troubleshooting.

Both paths can put Steam on the TV. The decision is which one supports your particular machine and the way you want to use it.

What Valve currently supports

Valve distinguishes officially Powered by SteamOS devices from broader PC compatibility. Its installation guide currently lists AMD discrete GPUs under beta support and says Steam Support may have limited ability to troubleshoot hardware outside the officially supported devices. An AMD card therefore puts SteamOS on the table; it does not make a custom PC equivalent to a supported Steam Machine. Valve's installation and support guidance

Consider SteamOS if you want Valve's gaming-focused environment and can work within that support boundary. Check the current instructions for your hardware before buying or erasing a drive.

Where Bazzite belongs in the decision

Bazzite documents separate hardware requirements for its desktop and Steam Gaming Mode experiences. Its Gaming Mode guidance describes AMD support, Intel Arc caveats, and more substantial NVIDIA caveats. The ability to run a desktop session should not be treated as proof that every Gaming Mode feature works equally well. Bazzite hardware compatibility

Use Bazzite's download selector to identify the image for your hardware and preferred session. Its installation documentation also covers Windows dual boot and Secure Boot enrollment. Those are useful reasons to consider it even with an AMD card. Bazzite installation guide

If you already own an NVIDIA card, read the current caveats before replacing hardware or committing to Gaming Mode. Do not assume an old image recommendation or an old issue report still describes the current release.

Make a short checklist for your couch

Before deciding, write down the things that would make this machine a success:

• Your three most important games, including any multiplayer or launcher requirements.
• Your TV's resolution and refresh rate, plus whether HDR matters to you.
• The controller and wireless adapter you actually own.
• Whether you need Windows available on the same machine.
• Whether you expect the controller to wake the PC, and whether a keyboard nearby is acceptable.

Check support for those items individually. Neither an operating-system label nor a fast GPU answers all of them. Treat reports from other machines as useful leads, and record what works on your own setup.

Choose the next step

Use the build planner to check your parts, then follow the installation guide. Keep the official documentation linked above handy: hardware support changes faster than a buying guide can promise.