Do KVM switches support 4K at high refresh rates for gaming?

Some do, but bandwidth varies widely by port type. DisplayPort 1.4 models generally advertise the highest combinations such as 4K at 144Hz or 240Hz, while many HDMI units cap at 4K@60Hz. Verified-purchase reviewers repeatedly note that real-world refresh-rate support can depend on your cables and EDID handling, so match the switch's rated bandwidth to your monitor and double-check cable specs.