@Augur For what it's worth, there have been multiple recent reports of people with HBR3 systems being unable to run 4K 60 Hz through a WD19. I believe thus far I've seen this report with one Precision system and two Latitude systems. My theory is that there's currently a firmware issue with the dock, but I don't know that for sure. I sent them to Dell-Chris M, who edited my first reply in this thread, because he has managed to get other issues escalated internally within Dell, so I hope these problem reports eventually make their way to the people in a position to address them. But the fact that you can't run 4K 60 Hz through a WD19 right now does not necessarily mean your system doesn't support HBR3.
@Augur The Inspiron 7706 has a Core 11th Gen CPU. The GPU built into that CPU supports DisplayPort HBR3 over USB-C/TB3, so I would expect the system to support it as well, but I agree it would be nice to see this mentioned in specs just to be sure that Dell didn’t introduce some kind of bottleneck/limitation with the motherboard design that prevents the GPU from operating at maximum capability.
@Augur What product line are you asking about? Dell reuses model numbers across product lines, so something like Dell 7706 could refer to an Inspiron, OptiPlex, Precision, etc.
<Checked private Service Tag. He has the Inspiron 17 7706 2-in-1. Updated title. DELL-Chris M>
