Do you need HDMI 2.1 for 4K 60Hz? Bandwidth and setup requirements

4K at 60 Hz with 8-bit 4:4:4 color needs 13.4 Gbps of uncompressed bandwidth. That's about a third of HDMI 2.1's effective 42.6 Gbps data rate, so HDMI 2.1 handles this mode trivially and leaves plenty of headroom for higher frame rates, deeper color, and HDR metadata.

Required bandwidth

13.4 Gbps

Uncompressed

With DSC

4.5 Gbps

Visually lossless 3:1

Mode

3840×2160 @ 60 Hz

8-bit 4:4:4

Interface Bandwidth Analysis

See how much uncompressed and compressed bandwidth this resolution and refresh rate mode demands, compared to the native limits of common video cables.

Uncompressed Signal13.4 Gbps

Cable Limits Reference

HDMI 2.0

14.4 Gbps

✓ Native support

DP 1.4

25.9 Gbps

✓ Native support

HDMI 2.1

42.6 Gbps

✓ Native support

DP 2.1 (UHBR 20)

77.4 Gbps

✓ Native support

Display Mode: 3840 × 2160 @ 60 Hz

Color depth: 8-bit 4:4:4

Resolution

Refresh Rate: 60 Hz

Color Depth

Chroma

Required Bandwidth

Uncompressed

13.38 Gbps

With DSC (Display Stream Compression)

4.46 Gbps

Interface Compatibility

HDMI 1.4

DSC Required

HDMI 2.0

✓ Native

HDMI 2.1 (48G)

✓ Native

HDMI 2.2 (96G)

✓ Native

DisplayPort 1.2

✓ Native

DisplayPort 1.4

✓ Native

DisplayPort 2.1 (UHBR 10)

✓ Native

DisplayPort 2.1 (UHBR 13.5)

✓ Native

DisplayPort 2.1 (UHBR 20)

✓ Native

How this is calculated

HDMI 2.0 maxes out at 14.4 Gbps, so this mode is right on its edge. It fits, but bumping to 10-bit HDR (needs 16.7 Gbps) breaks it unless you drop to 4:2:2 or 4:2:0 chroma. HDMI 2.1 has no such constraint at 4K60 and is the correct cable spec if you want HDR at full chroma without compromises.

Verdict

4K 60 Hz 4:4:4 is the easiest 4K mode. Any HDMI 2.1 cable handles it without breaking a sweat, and even HDMI 2.0 gets there at 8-bit. Pick HDMI 2.1 if there's any chance you'll move beyond 60 Hz or HDR.