Technically, the steam machine supports hdmi 2.1 The upcoming steam machine is listed as using hdmi 2.0 rather than hdmi 2.1, and a valve rep has now explained why this is the case. When valve launched its steam machine, it was listed with hdmi 2.0 support,.
Why won’t steam machine support hdmi 2.1 You can join the discussion about valve’s steam machine lacking hdmi 2.1 support on the oc3d forums. Digging in on the display standard drama
Hardware is getting let down by software and bureaucracy Does the hdmi forum really need to work this hard to protect hdmi 2.1