No signal, wrong resolution or stuck at 60 Hz? Find the limiting link

How the solver decides

It splits the connection into parts — computer output, anything in between, cable and the monitor input — and checks each one. A connection is only as good as its weakest part.

• FAIL means a documented limit rules your mode out. Example: 3440×1440 at 165 Hz needs at least 19.62 Gbit/s of active pixels at 8-bit RGB, more than an HDMI 2.0-class link’s 18 Gbit/s [H1].
• UNKNOWN means nothing rules it out, but something needed is missing, often the monitor’s exact timing for that input or a cable certification.
• CONDITIONAL means the numbers fit with a full timing you supplied, and the listed checks still have to hold.
• PASS needs the exact monitor model to list your mode for that input, plus documented capability on every part. A quick check from spec-sheet classes never says PASS.

The numbers are separated on purpose. Raw link rate (32.4 Gbit/s for DisplayPort HBR3 over four lanes) is not the same as usable payload (25.92 Gbit/s) [V1] [V2]. And a cable label like “8K 60Hz” describes one mode on one standard; it is not a 60 Hz ceiling for your monitor.

Which links can carry common modes

Active pixels × refresh × bits per pixel gives the minimum bitrate. Real signals add blanking, so a “Not ruled out” cell can still fail with the monitor’s real timing. DisplayPort payloads are VESA figures [V1] [V3]; HDMI payloads are DERIVED from the published raw totals [H1] [H2].

Same modes at 10-bit (HDR) colour

Calculated refresh ceilings

The highest refresh rate each link could carry at 8-bit RGB if there were no blanking at all. Treat it as a hard upper bound: if your target is above it, that link cannot do it.