Your monitor's on the other side of the desk and the cable you've got is either too short or it's an HDMI adapter doing a half-job. You need a proper DisplayPort run that reaches without dropping your resolution.
This ATEN 4.6 m cable handles 4K UHD (3840 × 2160 @ 60 Hz) at full HBR3 bandwidth of 21.6 Gbps. Multi-Stream Transport lets you split one DP output to two displays in mirror or extended mode — handy when you're running a second screen off the same port.
No dock, no powered hub, no settings menu. Plug it in, the handshake happens, and you're back to work.
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| brand | ATEN |
| model | 2L-7D04DP |
| type | DisplayPort Cable |
| length | 4.6 m |
| dp_version | DisplayPort 1.2 (HBR3) |
| max_bandwidth | 21.6 Gbps (HBR3) |
| max_resolution | 4K UHD 3840 × 2160 @ 60 Hz |
| mst_support | Yes (mirror and extended mode) |
| dual_monitor | Yes |
