For console gaming, HDMI 2.1 is a specification version with several possible capabilities—not a promise that every device with that label supports them all. VRR helps coordinate changing frame delivery with a display’s refresh rate; ALLM automatically switches the display to a low-latency mode. Whether either feature works depends on the exact console, display, and HDMI input.
What does HDMI 2.1 mean for gaming?
HDMI 2.1 is a version of the HDMI specification that includes multiple capabilities. HDMI Licensing Administrator (HDMI LA) lists support in its HDMI 2.1b overview for formats including 4K at 120Hz, 8K at 60Hz, and bandwidth up to 48Gbps. Those are specification capabilities, not assurances that every console, television, monitor, or HDMI input labeled HDMI 2.1 supports all of them. Check the manufacturer’s specifications for the exact models and ports you plan to use.
For gaming, the version number matters less than confirming the particular features and output modes your setup needs. A console and display must both support a feature, and the selected HDMI input must support the intended resolution and refresh rate. See HDMI LA’s HDMI 2.1b overview.
What is VRR on a TV or monitor?
VRR means Variable Refresh Rate. A game console does not always render each frame in exactly the same amount of time: complex scenes can take longer than simpler ones. With VRR, the source can deliver frames as they are ready instead of being forced to match a fixed display cadence. HDMI LA explains that this can help reduce judder and tearing when frame timing varies.
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VRR is about coordinating frame timing; it does not set the game’s frame rate or guarantee a specific performance level. Results depend on the game and the capabilities of the console and display, including their supported operating range. Read HDMI LA’s explanation of VRR.
What does ALLM do?
ALLM means Auto Low Latency Mode. During gameplay, a compatible source signals a compatible display to switch automatically to a low-latency mode, often called Game Mode. This can spare you from changing the display mode manually when you start playing. When the source stops signaling ALLM, the display can return to its previous mode.
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Low-latency modes may disable some picture-processing features. ALLM automates the display’s mode choice; it does not change how quickly the console renders frames. Read HDMI LA’s explanation of ALLM.
VRR vs. ALLM: what is the difference?
| Feature | What it addresses | What it does |
|---|---|---|
| VRR | Frame timing and motion artifacts | Coordinates display refresh with the source’s changing frame delivery. |
| ALLM | Display input lag and mode selection | Signals the display to enter a low-latency mode for gameplay. |
The two features solve different problems and can be useful together, but neither specifies the console’s frame rate. Support for one does not establish support for the other.
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Do you need HDMI 2.1 for PS5 or Xbox?
There is no universal answer based on the console name alone. First decide which output mode and features you want, such as VRR, ALLM, or 4K at 120Hz. Then check the specifications and current manuals for your exact console and display. Verify the specific HDMI input as well: a television may not support every capability on every port.
- Choose the target mode. Decide whether you need VRR, ALLM, a particular resolution and refresh rate, or some combination.
- Check the console. Confirm its support for those capabilities and output modes in the manufacturer’s specifications or manual.
- Check the display and input. Confirm the same features and mode are supported by the exact TV or monitor and the HDMI port you will use.
- Review setup requirements. Use the manufacturer’s current instructions for any settings that must be enabled. Menu names and behavior can vary by model and firmware.
HDMI LA recommends confirming device support with the manufacturers. The HDMI 2.1 label alone is not enough to establish compatibility for a particular gaming setup. HDMI LA’s overview describes the specification, while your console and display makers’ documentation is the place to confirm model-specific support.
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Do you need a new HDMI cable for 4K at 120Hz?
Not automatically. The cable is one part of the connection, and changing it cannot add VRR, ALLM, or a video mode that the console, display, or input does not support. For HDMI 2.1 system configurations up to 48Gbps, HDMI LA identifies the Ultra High Speed HDMI Cable category. Check the requirements for your intended setup and choose a cable that meets them; not every gaming setup requires a replacement.
See HDMI LA’s Ultra High Speed HDMI Cable information.
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