Original Summary

Bought a 4K 144 Hz monitor, plugged in the "right" cable, and the panel sits at 60 Hz. I've debugged that exact setup more than once: the problem is bandwidth math, and the answer is different for every resolution + refresh + color-format combo. So I built a checker that does the math for you: pick a resolution (1080p to 8K), a refresh rate (60 to 360 Hz), a color format and an interface (HDMI 1.4 to 2.2, DP 1.2 to 2.1, USB-C Alt-Mode) and it tells you the exact Gbps you need vs the link maximum, with a YES/NO verdict and headroom. Concrete example from the page: 4K 144 Hz in 8-bit RGB needs 35.04 Gbps. HDMI 2.0 caps at 18 Gbps and does not support DSC, so it cannot run at all. HDMI 2.1 (48 Gbps) carries it with 27% headroom, and DP 1.4a works once you enable DSC 3:1 - it fits at 11.68 Gbps after compression. It also tells you what to do when it does not fit: swap the port, enable DSC in the GPU control panel, use a cable certified for the full bandwidth, or drop the color format. From my experience that list covers 9 of 10 dead-high-refresh cases. Everything runs in your browser, nothing is uploaded and there is no sign-up. It lives in the 140 free tools here: https://appdoesit.com/apps/display-bandwidth Try it with your own monitor + cable combo :) which one says NO?   submitted by   /u/paq85 [link]   [comments]

  • 情报分类：综合情报
  • 分类依据：内容未命中明确的垂直分类规则，归入综合情报
  • 信息来源：Reddit · SideProject
  • 发布时间：2026/10/11 15:11:30