Video signal
18 Gbps / 600 MHz bandwidth
The maximum data rate of HDMI 2.0 — the Vertex² passes it through untouched.
What is it?
HDMI bandwidth is quoted two ways: 18 Gbps (total bit rate across the three data lanes) or 600 MHz (the pixel clock / TMDS clock). They mean the same thing. 4K60 4:4:4 8-bit and 4K60 4:2:2 12-bit both need the full 18 Gbps; 4K60 4:2:0 or 4K24 need far less (about 8–11 Gbps).
Why it matters with the HDfury Vertex²
Cheap switches, splitters and extenders quietly drop to 10 Gbps and force 4:2:0 or 8-bit. The HDfury Vertex² is a true 600 MHz device: two 18 Gbps signals can flow through it at the same time in matrix mode with less than 1 ms of delay, so you keep full chroma and 12-bit colour on your best display.
How to use it on the Vertex²
Use short, certified 18 Gbps cables (ideally 1–3 m copper; fibre HDMI for long runs). The OLED and the web server INFO page show the exact clock (e.g. '594MHz') of every signal so you can verify you are really getting 18 Gbps. If a link is unstable, try the Scaler page to output 4:2:2 12-bit instead of 4:4:4.
Related terms
- HDMI 2.0b — The HDMI generation the Vertex² is built on: up to 18 Gbps, 4K60, HDR10/HLG.
- Chroma subsampling: 4:4:4, 4:2:2, 4:2:0 — How much colour detail travels with the picture; 4:4:4 is full colour, 4:2:0 is what discs and streaming use.
- 4K120 4:2:0 and 8K30 4:2:0 — The highest resolutions/frame rates that fit through 18 Gbps — only with 4:2:0 8-bit colour.
- TMDS — The signalling method HDMI 2.0 uses; the Vertex² detects its clock to know a source is really active.