Xbox Series X|S: Fix No 4K, HDR, or 120Hz

When an Xbox Series X|S won't put out 4K, HDR, or 120Hz, the console is almost always capable — the signal is getting downgraded by the HDMI port you're plugged into, the cable, or a TV setting. One thing to get straight first: on the Series S, games render at 1440p, not 4K (the dashboard and video apps can hit 4K, but game rendering tops out at 1440p). The Series X is the 4K-gaming console. Everything below applies to both for HDR and 120Hz.

Fix it

1. Plug into a HDMI 2.1 (4K120) port. Many TVs put 4K120/VRR on only one or two ports — the rest are HDMI 2.0 and cap you at 4K60. Check your TV's labels and move the Xbox to a 2.1 port.
2. Set that port to its full mode. TVs ship ports in a limited mode by default. Set the input to Enhanced / HDMI 2.1 / "4K120" / Full (Samsung "Input Signal Plus", LG "HDMI Deep Color/Ultra HD", Sony "Enhanced format"). Without it, 4K HDR/120Hz won't be offered.
3. Use a certified Ultra High Speed (48 Gbps) cable. 4K120 and full HDR need the bandwidth; a cable that's fine at 4K60 will drop you or blank the screen at 120Hz.
4. Run the Xbox display check. Settings > General > TV & display options > 4K TV details. It tests the current cable+port and tells you exactly what it supports (4K60, 4K120, HDR10, Dolby Vision). Trust this over guesswork.
5. Turn the features on. In the same menu enable Allow 4K, Allow HDR10, Allow Dolby Vision, Allow Auto Low Latency Mode, and set the Refresh rate to 120Hz (per-game support varies).

If 120Hz still won't appear

• The game itself may not offer 120Hz — confirm in the game's video options.
• VRR/120Hz needs the port in its full mode and a 48 Gbps cable; a missing one silently caps you at 60Hz.
• Running through an AV receiver? It can cap the chain — see no 4K/120Hz through a receiver.
• Some TVs disable 120Hz when certain features (like motion processing) are on — turn those off in Game Mode.

If HDR looks wrong, not missing

• Make sure the TV is in Game Mode / HDR Game on that input, not a SDR picture preset.
• Run the Xbox HDR Game Calibration (TV & display options) so games tone-map to your panel.

FAQ

Does the Xbox Series S do 4K? Not for games — Series S games render at 1440p. It outputs 4K for the dashboard and streaming apps, but no game runs at native 4K. The Series X is the 4K-gaming console.

I'm getting 4K but no 120Hz. The port isn't on its full HDMI 2.1 mode, the cable isn't 48 Gbps certified, or the game doesn't support 120Hz. Check all three — the 4K TV details screen confirms the cable/port.

Why no HDR option on my Xbox? The input isn't set to its Enhanced/full mode, or the cable/port can't carry it. Set the port to Enhanced and run 4K TV details to see what's actually supported. (If the screen goes fully blank instead at those modes, that's the HDMI black-screen fix.)

Which HDMI port should the Xbox use? A HDMI 2.1 / 4K120 port — many TVs have only one or two. The other ports cap you at 4K60.