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

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.

4K at 60 Hz with 8-bit 4:4:4 color needs 14.3 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.

By TechCompare · Updated

Required bandwidth
14.3 Gbps
Uncompressed
With DSC
4.8 Gbps
Visually lossless 3:1
Mode
3840×2160 @ 60 Hz
8-bit 4:4:4, CTA-861

Interface Bandwidth Analysis

See how much uncompressed and compressed bandwidth this resolution and refresh rate mode demands, compared to HDMI and DisplayPort connections.

Uncompressed Signal14.3 Gbps
Display Connection Reference
HDMI 2.0
14.4 Gbps
✓ Native support
HDMI 2.1 48G
42.6 Gbps
✓ Native support
HDMI 2.2 96G
85.3 Gbps
✓ Native support
DP 1.4
25.9 Gbps
✓ Native support
DP 2.1b UHBR 20
77.4 Gbps
✓ Native support
Other connections

Assumes display traffic only and four DisplayPort lanes for USB-C. USB4 and Thunderbolt figures are for one DisplayPort stream.

USB-C DP 1.4
25.9 Gbps
✓ Native support
Thunderbolt 5
77.4 Gbps
✓ Native support
USB4 v2 80G / 120G
77.4 Gbps
✓ Native support
Display Mode: 3840 × 2160 @ 60 Hz
Color depth: 8-bit 4:4:4

Calculator

Display Bandwidth Calculator

Required Bandwidth

Uncompressed

14.26 Gbps

With DSC (Display Stream Compression)

4.75 Gbps

Interface Compatibility

HDMI
HDMI 1.4✗ Incompatible
HDMI 2.0✓ Native
HDMI 2.1 (48G)✓ Native
HDMI 2.2 (96G)✓ Native
DisplayPort
DisplayPort 1.2✓ Native
DisplayPort 1.4✓ Native
DisplayPort 2.1b (UHBR 10)✓ Native
DisplayPort 2.1b (UHBR 13.5)✓ Native
DisplayPort 2.1b (UHBR 20)✓ Native
Other connections

Assumes one display with no USB or PCIe data sharing. USB-C uses all four DisplayPort lanes. USB4 and Thunderbolt use the DisplayPort profile listed. The 120 Gbps modes add bandwidth for multiple streams, while one DP 2.1 UHBR 20 stream stays at 77.37 Gbps. Compare checks each display separately.

USB-C
USB-C (DP 1.2)✓ Native
USB-C (DP 1.4)✓ Native
USB-C (DP 2.1b UHBR 10)✓ Native
USB-C (DP 2.1b UHBR 13.5)✓ Native
USB-C (DP 2.1b UHBR 20)✓ Native
Thunderbolt
Thunderbolt 3 (40G, DP 1.2)✓ Native
Thunderbolt 3 (40G, DP 1.4)✓ Native
Thunderbolt 4 (40G, DP 1.4)✓ Native
Thunderbolt 5 (80G / 120G Boost)✓ Native
USB4
USB4 20G (DP 1.4, HBR2)✓ Native
USB4 40G (DP 1.4)✓ Native
USB4 v2 (80G / 120G, DP 2.1)✓ Native
This exact 3840×2160 @ 60 Hz signal, pre-loaded. Swap the resolution, refresh, or chroma, or compare two modes.
Edit in the full tool

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 17.8 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

The mode fits inside 14.3 Gbps which is about a third of HDMI 2.1's effective 42.6 Gbps rate, leaving plenty of headroom for higher refresh rates, deeper color, and HDR metadata. HDMI 2.0 maxes out at 14.4 Gbps effective, so the mode lands right on that interface's edge, and bumping to 10-bit HDR (17.8 Gbps) breaks it unless you drop chroma to 4:2:2 or 4:2:0. That's why HDMI 2.1 is the right cable even for a basic 4K 60 setup: any future jump to 4K 120 Hz, 144 Hz, or HDR doesn't force a cable swap.

More HDMI 2.1 scenarios

HDMI 2.1 - 4K 120 Hz HDR
4K 120 Hz with 10-bit 4:4:4 color HDR needs 35.6 Gbps, the benchmark mode HDMI 2.1 was designed to support without compression.
View details ➜
HDMI 2.1 - 4K 144 Hz HDR
4K 144 Hz with 10-bit 4:4:4 HDR needs 39.2 Gbps, within 8% of the calculator's effective 42.6 Gbps HDMI 2.1 model.
View details ➜
HDMI 2.1 - 8K 60 Hz (4:2:0)
8K at 60 Hz with 10-bit 4:2:0 chroma works out to 35.6 Gbps, the uncompressed figure HDMI 2.1 was carefully engineered to support.
View details ➜

Related guides

55" 16:9 TV screen size
The TV panel size a 4K 60 Hz HDMI 2.1 cable most commonly drives.
View guide ➜
55" 4K TV PPI
PPI of the 4K 60 Hz panel this is the standard cable for.
View guide ➜
100 GB over USB 3 transfer time
The transfer-rate analog for USB bandwidth.
View guide ➜

Frequently asked questions

Do you need an HDMI 2.1 cable for a basic 4K 60Hz display?
No, a standard HDMI 2.0 cable supports 4K 60Hz at 8-bit color. However, if you want 10-bit HDR at full color depth, you will need HDMI 2.1.
What bandwidth does 4K 60Hz require?
It requires 14.3 Gbps for uncompressed 8-bit 4:4:4 color, which fits within the 18 Gbps (14.4 Gbps effective) limit of HDMI 2.0.
Can I run 4K 60 Hz HDR with 10-bit color over HDMI 2.0?
Not at full 4:4:4 chroma. 4K 60 Hz 10-bit 4:4:4 needs 17.8 Gbps, which exceeds HDMI 2.0's 14.4 Gbps ceiling. You have to drop chroma to 4:2:2 or 4:2:0 to fit. HDMI 2.1 handles 4K 60 Hz HDR at full 4:4:4 with room to spare, so pick HDMI 2.1 if you want HDR at native spec.
What does the 'Ultra High Speed' label on HDMI 2.1 cables mean?
It is the official HDMI Forum certification mark for cables that carry the full 48 Gbps bandwidth of HDMI 2.1. Buy cables with this label, not cables that just claim 'HDMI 2.1 compatible' on the box. Cheap uncertified cables often saturate around 32 Gbps and fail on 4K 144 Hz HDR modes.

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