For high-performance TVs and monitors, there are two main cable types that you need to know about: HDMI and DisplayPort.

like this 4K Cable Matters cord, and connect the first monitor to your computer. Make sure you're plugging it into your graphics card. Use another DisplayPort cable to connect to the next monitor.

In this case, you can test your DisplayPort connection with another DisplayPort cable or even with another computer or monitor. Also, check to make sure the issue isn’t from the cable or from ...