- Connecting
- Need
- Answer
HDMI cable for 4K 60 Hz
Get this
Premium High Speed HDMI (18 Gbps certified), or Ultra High Speed
Look for
- Certification label with a scannable code on the box
Avoid
- Unlabelled "4K" cables over 3 m
- "Standard" HDMI cables
The numbers: 4K 60 Hz 10-bit 4:2:2
| Link | Needs | Has | Result |
|---|---|---|---|
| HDMI 1.4TV timing | 14.26 Gbps | 8.16 Gbps | Too much |
| HDMI 2.0TV timing | 14.26 Gbps | 14.40 Gbps | Fits |
How the numbers are worked out
Reduced-blanking timing (VESA CVT-R2)
3840×2160 active → 3920 × 2222 total pixels per frame
3920 × 2222 × 60 Hz = 522.61 MHz pixel clock
522.61 MHz × 20.0 bits per pixel = 10.45 Gbps
10-bit colour, 4:2:2: 2 × 10 bits per pixel.
"Has" is the link's usable rate after line coding. DSC is modelled as up to 3:1 compression. Full method.