What Is 8K Resolution?

8K resolution is an image 7680 pixels wide and 4320 pixels high, in the same 16:9 shape as HD and 4K TV. It is also called 8K UHD or 4320p. Like 4K, the name rounds the horizontal pixel count, which is close to 8,000.

An 8K frame holds about 33.2 million pixels. That is twice the width and height of 4K (3840 × 2160), so four times the pixels, and 16 times full HD. A single 8K frame has roughly the detail of a 33-megapixel photograph.

The format is defined for television in ITU-R Recommendation BT.2020 and SMPTE ST 2036-1, alongside 4K. Japan’s broadcaster NHK has run an 8K satellite channel since 2018, but most 8K material today comes from cameras, scientific imaging and computer graphics rather than broadcast.

Each step up multiplies the data. The uncompressed figures below assume 8-bit colour at full chroma (4:4:4) and 60 frames per second, before any compression.

Real links also carry blanking and error-correction overhead, so 8K at 60 Hz with full colour usually relies on Display Stream Compression (DSC) or 4:2:0 chroma subsampling, both of which are visually lossless for most content.

Every link in an 8K chain has to be rated for it. The weak point is often the cable or an adapter rather than the screen.

8K is most useful where a single image has to hold more detail than a person can see at once. A wide 8K view can be cropped and zoomed digitally afterwards, so one camera can do the work of several fixed 4K cameras.

Typical uses include surface and print inspection, large-area surveillance, microscopy and pathology, sports and event production, and recording a computer’s 8K output for test and validation. In each case the computer needs a capture card that accepts the 8K signal without dropping frames.

Our 4K and 8K capture cards include HDMI 2.1 capture cards that take 8K at 60 frames per second in PCIe, M.2 and USB formats, plus a DisplayPort 1.4a card that captures 8K at 30 frames per second. For AI analysis, the frame is usually scaled or tiled before inference, while recording keeps the full 8K image.

Plan the rest of the computer around the data rate. At 60 frames per second, an 8K source delivers about 2 billion pixels a second, roughly the load of sixteen 1080p cameras. That typically calls for a fast PCIe slot for the capture card, NVMe storage that can sustain the recording bitrate for hours, and a GPU or AI accelerator if the full frame is to be analysed rather than just recorded.

8K screens are mostly large consumer TVs and a few professional monitors. In industrial and control room use they remain rare, and most large-format industrial monitors stay at 4K. For more on that format, see our FAQ on UHD and 4K resolution.

Where 8K does appear is in digital signage. Media players and OPS computers built on current Intel processors often list an 8K output, which lets one player drive an 8K display or a video wall from a single source.

Whether the extra pixels are visible depends on size and distance. On a 55 inch (55″) screen viewed from 2 m or more, most people cannot tell 8K from 4K. The difference shows on very large screens, close-up viewing and content that will be cropped.

We supply 8K capture cards fitted, driver-installed and tested in the computer that will run them, as standard. Send us your source, frame rate and what you need to do with the video, and we will specify the card and computer to match.