Unfortunately, there are a lot of poor quality cables out there, so a cable built and sold for DisplayPort 1.2 may not work with DisplayPort 1.4.

A properly manufactured, certified cable built for DisplayPort 1.2 should work perfectly fine with DisplayPort 1.4. If you’re using DisplayPort, be sure you have a properly certified cable that’s built to the DisplayPort specification. You don’t just have to worry about the type of cable, either–you have to worry about the cable itself. Check your monitor’s specifications or setup guide for more information. In this case, you’d need to use a DisplayPort cable. Some monitors may have both HDMI and DisplayPort connections, but may be limited to a 60Hz refresh rate when connected via HDMI. You can’t just use any old cable and expect a high refresh rate. If you don’t see your monitor’s advertised refresh rate in this list-or if you can’t seem to get your monitor to stay configured at the advertised refresh rate-there’s more you need to do. Select your monitor (if you have multiple monitors) and then click the “Advanced Settings” link. Click the “Monitor” tab and choose the refresh rate from the “Screen Refresh Rate” box. On Windows 7 or 8, right-click the desktop and select “Screen Resolution”. Click the “Monitor” tab, choose your monitor’s advertised refresh rate from the “Screen Refresh Rate” list, and click “OK”. On Windows 10, head to Settings > System > Display > Advanced Display Settings > Display Adapter Properties. Most importantly, you’ll want to ensure Windows is actually set at the advertised refresh rate and not a lower refresh rate, like 60Hz.

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