Why the cheap monitor has HDMI and not DisplayPort, and when it actually costs you something

A recurring surprise: the budget monitor has two HDMI ports and no DisplayPort. There is a reason, and it matters less often than people fear.

Why
HDMI is licensed per device with a royalty, and DisplayPort is royalty free. That sounds backwards until you look at where budget monitors come from: the same panel and controller board is built for televisions and monitors, and that ecosystem is entirely HDMI. Adding DisplayPort means a different controller, extra validation and a part that most buyers never use. On a cheap monitor those costs are a meaningful fraction of the price.

When it actually costs you something

• High refresh rates at higher resolutions. Older HDMI versions run out of bandwidth before DisplayPort does. Check the version number rather than the connector.
• Adaptive refresh. Historically much better supported over DisplayPort, though modern HDMI handles it.
• Daisy chaining monitors, which is DisplayPort only.
• Some graphics cards have more DisplayPort outputs than HDMI, so a multi-monitor setup can leave you short of the right kind of output.

When it does not matter
Ordinary desktop use at ordinary refresh rates. The image is identical; both are digital and there is no quality difference at the same signal.

The thing that actually causes problems is the cable, not the port. Cables are sold by a version number that many do not meet, and an underspecified cable produces flicker, black frames or a mode that silently drops to a lower refresh. If a setup misbehaves, swap the cable before blaming anything else.

Practical: check the HDMI version against your resolution and refresh rate, and buy a certified cable. The port on the back is rarely the constraint.