With port information in hand, you’re ready to pick out the best new monitor for your dual-display setup. Step 2: Make sure your monitors are compatible and connect them Chuong Nguyen / Digital Trends The laptop screen itself can also be used as a second monitor with the right setup, although that isn’t as common. You can also use a monitor as a second screen with a laptop, as long as that laptop has compatible display ports of its own. Note which spare port you will be attaching the new monitor to and what connection type you’ll need. Make sure you have at least two of these display ports for two monitors. You may also have a DVI-I port for managing older digital/analog connections, and some PCs might still have a VGA port (although we don’t advise using this for a second monitor). For modern monitors and PCs, the two common options are HDMI and DisplayPort, with even newer models also offering USB-C and Thunderbolt 3 for A/V data. Now check to see what kind of display connections you have to work with. Snap a quick photo of this whole section for quick reference if necessary. If you have a discrete (non-integrated) GPU, then there may also be a GPU section with ports of its own to take stock of. If it’s been a while since you’ve peeked back there, take a look before you buy a secondary monitor. Your PC has an area for all important cable connections, typically called the I/O panel. Step 1: Check your I/O panel and GPU for connections

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