Does HDMI 2.2 support 4K 240Hz uncompressed? Bandwidth and cable guide
By TechCompare · Updated · How we check
Yes, on a 96 Gbps HDMI 2.2 port. The mode needs 68.6 Gbps uncompressed, under the 85.33 Gbps effective rate, so DSC isn't needed.
Interface Bandwidth Analysis
See how much uncompressed and compressed bandwidth this resolution and refresh rate mode demands, compared to HDMI and DisplayPort connections.
DSC uses visually lossless 3-to-1 compression, shrinking the required bandwidth so it fits through older cables.
Other connections
Assumes display traffic only and four DisplayPort lanes for USB-C. USB4 and Thunderbolt figures are for one DisplayPort stream.
4K at 240 Hz with 10-bit 4:4:4 color needs 68.6 Gbps uncompressed. That's 80% of the 85.33 Gbps effective rate on an HDMI 2.2 port, so the mode fits without Display Stream Compression (DSC). Not every HDMI 2.2 port has that much bandwidth, though.
Cables for your display settings
HDMI and DisplayPort cable options for these settings. Choose the connectors your devices support.
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Both device ports must support the required display mode. A cable won't upgrade a port. Options marked DSC require compression support on both devices.
Display cable - Premium
UGREEN 96 Gbps HDMI Cable (2 m)
Fits this display mode without DSC
- Display connection: HDMI 2.2 (96G)
- Cable length: 6.6 ft (2 m)
- Cable jacket: Braided
Display cable - Recommended
UGREEN Ultra High Speed HDMI Cable (2 m)
Requires DSC for this display mode
- Display connection: HDMI 2.1 (48G)
- Cable length: 6.6 ft (2 m)
- Cable jacket: Braided
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How this is calculated
This page assumes a 96 Gbps HDMI 2.2 port, the top tier, which the calculator models at 85.33 Gbps of effective data rate. HDMI 2.2 doesn't promise that much on every product. The HDMI Forum says the Ultra96 name covers products rated from 64 Gbps up to 96 Gbps, so check the rating on the product before you rely on this model. The HDMI Forum's bandwidth page also lists uncompressed 4K at 240 Hz with 4:4:4 color at 10-bit and 12-bit among the options HDMI 2.2 will support. The calculator uses CVT-RB v2, a reduced blanking timing standard.
Verdict
Pick HDMI 2.2 when you want this mode without compression, and check the port's rating before you buy. The mode uses 80% of the link's effective rate, which leaves 20% unused. A lower-rated port may not carry it. A 96 Gbps port needs an Ultra96 HDMI Cable, since the Ultra High Speed cable is for setups up to 48 Gbps.
More HDMI 2.2 scenarios
Related guides
Frequently asked questions
Does HDMI 2.2 support 4K 240Hz without DSC?
Do all HDMI 2.2 ports reach the top tier?
Do I need a special cable for HDMI 2.2?
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