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I saw this DELOCK 82438 Mini DisplayPort - Displayport cable where the image shows one end is an input, while the other is an output. They also say in the description that this is a Mini DisplayPort male > DisplayPort male cable, indicating the direction.

Mini DisplayPort male > DisplayPort male cable

Does this really exist? A DisplayPort cable with one direction? What makes the data "flow" only to one way?

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  • I can't think of any "output" devices or monitors etc that have a mini-dp in. The mac monitors have a thunderbolt in but that's not the same thing. I do have one of those types of mini-dp to dp cables connected from my mac to a AURIA 27" and it works well.
    – Optichip
    Jan 14, 2015 at 11:47
  • @Optichip It's been five years, so some there some monitors with it, now. For one, the Dell U2717D has both regular and mini DisplayPort inputs. Apr 9, 2020 at 6:29
  • The Samsung U24E850R also has regular and mini DP inputs. It comes with a regular to mini DP cable and it works in both directions so if you are concerned then perhaps buy a Samsung cable from a monitor being sold separately.
    – malhal
    Jul 23, 2021 at 22:16

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The only difference is the connector; the mini and regular connectors are electrically equivalent. According to Wikipedia,

The mDP pin assignments are the same as the full-size DisplayPort connector.

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