How to Use Two Computers With One Display Monitor

Quick Tips

• Using a monitor with 2 input ports, you can connect 2 different computers with distinct cables.
• You can also use a remote desktop program to run 2 computers simultaneously on one monitor.
• The best alternative it to use a KVM switch which allows you to use the same peripherals too with different PCs.

Method 1: Insert Two Cables Into One Monitor

Most monitors have multiple input ports at the back. You can connect both computers to your monitor simultaneously using different cables. Then, using the monitor’s input selection via the control buttons on the back or side (or remote control if it has one), you can choose which computer’s output you see. This only works for monitors with multiple ports, though – and you may have to pick different cables for the two computers.

You can connect one via DVA or VGA port, for example, and the other via HDMI – it depends on the hardware you have available. Some monitors even have a DisplayPort connection, while new monitors can output via USB-C. Check your monitor’s rear panel to see the available ports. Once you do this, you can switch between input sources to switch monitors between the two computers.

Tip: Some ultrawide monitors can display two computers simultaneously, side by side. This feature is generally exclusive to modern, high-end, ultrawide monitors. If you have a monitor like that, you can set it up to display two computers on one monitor. Google your exact monitor model for instructions on how to do so.

This is a cheap way to connect two computers to one monitor but doesn’t solve the problem of other peripherals, such as mice and keyboards – you will still need two sets of each or constantly unplug and replug them. Neither option is ideal, especially if you need to change devices regularly.

Also Read: 2 easy ways to use your laptop as a second monitor in Windows 11

Method 2: Use a Hardware KVM Switch

Another option is to use a hardware device called a KVM switch. KVM stands for “Keyboard, Video, and Mouse”. A KVM switch is a device that can control multiple computers through a single keyboard, mouse, and monitor. This saves you the trouble of having to have two sets or having to unplug and replug constantly. You will, however, have to buy an additional piece of tech.

The KVM will have a switch or button to choose which computer is supposed to have access to the peripherals. The switch can be flipped at any time to change which device is being controlled. In order to work, both computers need to be switched on. The actual switching usually takes only a few seconds – until your monitor has switched to its new input. You will also have to have your KVM switch somewhere you can easily get to it.

Price and functionality can vary dramatically from less than $20 for a simple two-device switch to more than $100 for high-end devices supporting multiple 4k connections – the right device depends on your usage requirements. This option is the most space and user-friendly; the only downsides are having to get the new piece of hardware and the fact that the computers must be close enough together to be cabled into the same KVM. There usually aren’t a lot of spare cables, so you’ll have to have both machines fairly close together.

Method 3: Use a Remote Desktop Program

Remote desktop connections are your next best option. Programs like Microsoft Remote Desktop and TeamViewer allow you to remotely control another computer, passing through keystrokes and mouse movements. This can be a free and simple solution, allowing you to remotely control one or more other computers from your main device. You don’t even have to be in the same country as the second computer – however, there are some issues with this type of connection as well.

The primary downside of remote desktop connections is usually the connection quality. Some connections may be bad enough that your inputs, such as keystrokes or mouse movements, are delayed. However, that level of lag is unlikely if the other computer is on your local network.

Another problem is the screen clarity. It’s normally fine for generic browsing or word processing, as not much of the screen changes. However, remote desktop connections are heavily compressed, so the data can be transmitted reliably. This means fast-moving images, such as videos or games, can become a pixelated blur, and using graphic editing programs like After Effects is nearly impossible.

Additionally, the second computer must be active and able to approve the remote connection – in many cases, that means someone has to set up the connection on both computers before it works. Considering these downsides, using a remote desktop client should be your last resort for any sort of intensive work.

FAQs for Running Two Computers With One Monitor