4K Video Performance Issue on macOS

[Siggi]

Originally Posted by AlbanRampon

Hello,

D6000 and UD22 use the same DL-6950 chip, which give 2x 4K outputs at 60Hz, but the video is different on the DisplayPort Alternate-Mode. USB Power Delivery (Charging) and a few other things are improved on the UD22, but the D6000 has both headphone and line out.
So, it depends on features you want, really.

Thanks,
Alban

Hallo Alban,

Im currently using a Dell D6000 which apparently uses your newest chip, regardless being that old (?!). Yet im very unpleased by the performance. In my opinion, it's ridiculous to advertise this dock/ chip idk being capable of an output of 2x4k60. With only one monitor being connected to the dock and another to the Mac itself results in a pretty good image. But as you have pointed out, this stupid dock can't use DP alt mode unless a third monitor is connected. But adding another (redundant) cable which points to the same monitor won't solve my issue as DisplayLink can't handle two 4k monitors at 60Hz. Are the horrible lags using the dock with two monitors caused by the Mac, the dock or the DL chip? And would an upgrade to the absurdly expensive Dell UD22 solve my issue? I guess not because it uses the same ancient chip..