Technically, the Steam Machine supports HDMI 2.1. However, Valve and AMD are not allowed to offer an open-source driver for it.

The HDMI Forum, responsible for the HDMI specification, continues to stonewall open source. Valve’s Steam Machine theoretically supports HDMI 2.1, but the mini-PC is software-limited to HDMI 2.0. As a result, more than 60 frames per second at 4K resolution are only possible with limitations.

    • Echo Dot@feddit.ukEnglish
      1·
      13 minutes ago

      As much as I agree I think it would have been a bad move for them to do that. The devices success is already highly dependant on its price, which is still in flux as far as I understand, there is no reason for them to make the decision even more difficult.