How to Choose the Right HDMI Cable

- Difficulty
- Beginner
- Tested on
- HDMI 2.1 Specification
- You will need
- Display hardware, source device, tape measure
Step by step
Identify your resolution and refresh rate
Determine the native resolution and maximum refresh rate of your source device and display. 4K at 60Hz requires different bandwidth than 4K at 120Hz or 8K content. Higher resolutions and frame rates demand higher data throughput.
Note: Check your TV or monitor manual for the 'Supported Input Signals' section.Match the cable classification to the bandwidth
Purchase 'Ultra High Speed' HDMI cables for 4K/120Hz or 8K support, as they handle 48Gbps. For 4K/60Hz, 'Premium High Speed' cables are sufficient at 18Gbps. Avoid legacy 'Standard' cables for modern displays.
Note: Look for the holographic QR code on the packaging to verify certification.Check for eARC support
If you are connecting a soundbar or receiver, ensure your cable supports eARC (Enhanced Audio Return Channel). All 'Ultra High Speed' cables support eARC by default. This enables high-bitrate audio formats like Dolby Atmos and DTS:X.
Determine the required cable length
Keep the cable length as short as possible to prevent signal degradation. For distances over 5 meters, use active optical HDMI cables to maintain signal stability. Avoid coiling excess cable tightly behind the display to prevent interference.
Note: Passive copper cables lose effectiveness significantly beyond 5 meters.Verify physical build quality
Select cables with robust connector housing and shielding. Ensure the connector fits snugly into the HDMI ports without excessive wiggle room. Avoid cables with overly rigid jackets if you need to route them through tight cable management channels.