I have one powerful Windows computer and three less-expensive PCs that I want to use for specialized tasks. Since I already have a three-monitor setup, I was thinking about dedicating one monitor to switching between the machines. Would a KVM be worthwhile, or would it make more sense to connect to the other computers through RDP? The extra systems include Linux machines, and some tasks may need a graphical interface, though they are not necessarily latency-sensitive.
4 Answers
If the other machines do not need a graphical desktop, skip the KVM and leave them headless. Set up SSH access and manage them from the main computer. That is inexpensive, reliable, and especially convenient for Linux systems.
I have had good results with a KVM that supports several different video inputs, including USB-C, DisplayPort, and HDMI. My arrangement keeps the main monitor connected directly to my primary desktop, while a second monitor switches between that desktop and the other computers. It works with a mix of desktops, a laptop, and a small single-board computer, although there are many possible layouts depending on how many monitors and peripherals you want to share.
For the cheapest and simplest setup, remote access is probably the best choice. RDP or another remote-desktop tool can handle one monitor, several monitors, or a custom selection. Unless you need low latency for gaming or similarly timing-sensitive work, using your main computer to access the other three should work well. Quality four-computer KVMs do exist, but they can get expensive quickly.
A four-PC KVM can work well if you want direct control and don't want to deal with remote sessions. TESmart-style units support multiple computers and monitors, plus peripherals such as a webcam, keyboard, mouse, and other USB devices. They can occasionally be a little finicky, especially with monitor switching and higher-performance video, so check compatibility carefully.
Some of the less flashy KVMs from this category work surprisingly well. The important thing is to choose the right input and output combination for your monitors rather than focusing only on the brand.