CableDoctor - Display Bandwidth & Refresh Rate Cable Diagnostic

⚡ 1. Quick Device Setups

🖥️ 2. Display & Video Target

Screen Resolution

Refresh Rate (Hz)

Color Depth

Chroma Subsampling

Enable Display Stream Compression (DSC ~3:1 visually lossless)

🛡️ 3. Cable Buying Traps & Rules

⚠️ The "Fake HDMI 2.1" Scam

In 2021, HDMI Licensing allowed old HDMI 2.0 cables to be marketed as "HDMI 2.1". Always look for the exact label "Ultra High Speed HDMI" (48 Gbps) with the holographic QR code!

🔌 Active vs. Passive Adapters

When converting DisplayPort to HDMI for 4K 120Hz/144Hz, a cheap passive adapter will cap you at 60Hz. You must buy an Active DP 1.4 to HDMI 2.1 adapter.

Required Payload Bandwidth

35.8 Gbps

Pixel Clock: -- MHz

Uncompressed Rate: -- Gbps

DSC Compression: Disabled

📊 Real-Time Bandwidth Utilization per Port Standard Max usable payload throughput

📋 Cable Standards Breakdown & Verdicts