I use DisplayPort and I can get 144Hz and 1440p just fine. Although it wasn't initially recognized and only went up to 100Hz the first time, I'm not entirely sure why this is happening, but after disconnecting and reconnecting it stayed at 144Hz. I've also used all the other ports with no problem and noticed a loss in video quality and currently only use it for one monitor. I use it to connect Thunderbolt 3.
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