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Because the Dell UP2715K has 10 bits per color channel, even DisplayPort 1.4 HBR3 would not be enough. It would work with Display Stream Compression, but that a
by andor 6y ago
Because the Dell UP2715K has 10 bits per color channel, even DisplayPort 1.4 HBR3 would not be enough. It would work with Display Stream Compression, but that appears to be an optional feature of DP 1.4 that is not universally supported. Also, the compression is lossy.
Additional speculation: all 5k displays on the market so far (LG, Dell, Iiyama, ...?) were made as Apple accessories, probably with Thunderbolt ports in mind. Because the market is not that large they might share some components. TB3 only requires DP 1.2, but can carry multiple streams. The expensive LG display includes a TB3 hub that demultiplexes the DisplayPort streams and sends them off to a dual-link DP controller. Less expensive displays leave out the Thunderbolt part and require dual DisplayPort inputs for full resolution.
- andor 6y agoWith HBR3, net bandwidth for uncompressed image data is 25.92 Gbit/s. 8bit 4k at 120Hz: >>> (3840 * 2160 * 24 * 120) / (1000*1000*1000) 23.887872 10bit 5k at 60Hz: >>> (5120 * 2880 * 30 * 60) / (1000*1000*1000) 26.54208
- StillBored 6y agoRight, so DP 1.3 which supports "32.4 Gbit/s with the new HBR3... a 5K display (5120 × 2880) at 60 Hz with 30 bit/px RGB color" is enough. The UP2715K, only support dual link DP 1.2/HBR2, which was a bit of a PITA on my machine because nvidia's board partners don't always do a good job of describing which ports on the back of the card can be used for dual link. https://downloads.dell.com/manuals/all-products/esuprt_display_projector/esuprt_display/dell-up2715k-monitor_user%27s%20guide_en-us.pdf https://downloads.dell.com/manuals/all-products/esuprt_displ...