Guides
A small set of guides that answer the questions behind the most common checker results. Each one is practical, sourced, and links back to a check you can run on your own hardware.
Why is my 240Hz monitor only showing 144Hz?Wrong port, a bandwidth ceiling, DSC disabled, or a display setting - how to find which one.HDMI vs DisplayPort for high refresh rate monitorsWhy the same monitor often reaches a higher refresh rate on one connector than the other.What is Display Stream Compression (DSC)?The compression that lets 4K 240Hz fit down a DisplayPort 1.4 or HDMI cable - and its limits.Why "HDMI 2.1" does not always mean the same bandwidthAn "HDMI 2.1" port can be 24, 32, 40 or 48 Gbps. The label does not tell you which.G-SYNC vs FreeSync: what matters for compatibilityThe VRR branding maze, and the short answer on what has to line up between card and screen.How to enable 10-bit color on a gaming monitorWhere the setting is on NVIDIA and AMD, and why 10-bit can cost you refresh rate.