4K and UHD
UHD is 3840×2160 pixels, four times Full HD. In TV marketing it is called 4K; cinema 4K is 4096 pixels wide.
4K and UHD tell you how many tiny dots (pixels) make up the picture. A UHD picture is 3840 dots wide and 2160 dots high.
Imagine a mosaic: Full HD uses about 2 million tiles, UHD uses about 8 million. More tiles means finer detail, if you sit close enough or the screen is big enough to see it.
Does the HDfury Vertex support 4K UHD at 60 Hz?
YESYes. The Vertex handles UHD 3840x2160 and DCI 4096x2160 up to 4K60 4:4:4 8-bit or 4K60 4:2:2 12-bit. 4K120 passes only as 4:2:0 8-bit; HDMI 2.1 4K120 formats do not fit.
How to use it with the Vertex:
- No special source setting is needed: the source sees the Vertex as a 2160p60 4:4:4 capable device (p.104).
- Use 600MHz-certified cables for 4K60 4:4:4 8-bit or 4K60 4:2:2 12-bit (p.5).
- Check the incoming format on the OLED info page or in the GUI RX0/RX1 lines (p.19, p.27).
- For a 1080p display or AVR, connect it to the TOP output and use Auto Scaling to scale 4K down (p.14, p.103).
What it is
UHD (Ultra HD) is 3840×2160 pixels, also written as 2160p. That is exactly twice the width and twice the height of Full HD (1920×1080), so four times as many pixels. TVs, UHD Blu-ray and streaming services call this "4K".
Cinema uses a slightly wider format, DCI 4K, which is 4096×2160 pixels. Both are called 4K, but they are not the same size.
Resolution alone does not tell you how heavy a signal is. The frame rate (for example 4K24 or 4K60), the bit depth and the chroma format (4:4:4, 4:2:2 or 4:2:0) decide how much HDMI bandwidth is needed.
On the Vertex
The Vertex handles UHD up to 4K60 4:4:4 8-bit, 4K60 4:2:2 12-bit, 4K120 4:2:0 8-bit or 8K30 4:2:0 8-bit (p.109–110). It also processes DCI 4096×2160 (p.107). It is an HDMI 2.0b device (18 Gbps), so 4K120 at 10-bit or 4:4:4 and other HDMI 2.1 formats do not fit.
Your source sees the Vertex as a 2160p60 4:4:4 capable device, so you do not need to set a special resolution in the source (p.104). The Vertex can scale UHD down to Full HD for an older display or AVR on the TOP output, and scale Full HD up to UHD on the BOTTOM output (p.14, p.31, p.103).
Common questions
Is 4K the same as UHD?
On TVs and players, yes: "4K" almost always means UHD, 3840×2160. Cinema 4K (DCI) is 4096×2160 and is a different format.
Can the Vertex pass 4K120 or 8K?
Only as 4K120 4:2:0 8-bit or 8K30 4:2:0 8-bit (p.109–110). Anything that needs HDMI 2.1 bandwidth does not pass.
Why does my 4K TV not accept 4K60 4:4:4?
Many TVs accept it only on certain HDMI ports and only after you switch on an extra setting, such as UHD Color or PC mode on Samsung (p.103).