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Are high resolution and high refresh rates affordable? I don't know if you have one. When connecting them to previous HDMIs, many small partners may experience issues such as lights not coming on or refresh rates not improving. It may be that many people subconsciously fiddle with the ports, power supply, and even check the console, upgrade the graphics driver, and throw it all away at once, but the actual reason may be as simple as your HDMI cable is probably obsolete.

In fact, just a year or two ago, if you had an HDMI cable, you could basically plug it in and use a so-called 4K monitor, which was perfectly fine. This was because most monitors at the time had HDMI 1.4 ports and didn't require much in the way of HDMI cables. An older HDMI 1.3 cable is usually available (HDMI 1.2 is not popular and is rare). However, when new monitors start using HDMI 2.0/2.1 ports, things change. If the cable capacity is insufficient, the monitor will usually become picky.

If the version is not marked, you can basically confirm the 4K / 30Hz display as HDMI 1.4.

HDMI 2.0 cables are still plentiful and affordable. But a person who already has an HDMI cable, and possibly many of them, won't want to buy one. How does he know if his HDMI cable supports the new monitor? In practice, this is not difficult, as the version is already marked on many cables. For example, if "High Speed" is displayed, it is usually an HDMI 1.4 standard cable.

If the word "Premium High Speed" is written on the line, or if the word "Premium" is written on the line, and the connector and packaging have the word "premium" on it, the chances are High that HDMI 2.0 will be supported, but that's the limit of it yes, Some of the longer products actually don't have this bandwidth or don't support HDR very well (HDMI 2.0a version).

A cable labeled "Super fast" is the most reliable if you want to accommodate the newer HDMI 2.1 interface display, or if you want to provide perfect HDR graphics on an HDMI 2.0 interface. Its bandwidth can reach 48Gbps, 8K resolution, 2K / 4K ultra high refresh rate, etc. No problem, but it must be more expensive.