We recently purchased several Precision 7530 and WD19DC docking stations with the intent on using them with triple displays. We're using this with Dell 27" displays with a native resolution of 2560 x 1440.
Unfortunately we're only able to get 2 out of the 3 monitors to display at this resolution. The third monitor won't go higher than 2048 x 1152. All monitors are plugged into the docking station using the 2 display ports and 1 USB-C port. We've made sure all drives are up to date.
According to the WD19 User Guide, it looks as though this hardware should be capable of outputting 3 @ 2560 x 1440. Any thoughts as to why this isn't working?
EDIT: after a bit more digging around, I found we needed to enable "Graphic Special Mode" in the BIOS which enables discrete graphics. Process is described here, though the option was labeled a bit differently for us. After enabling, we're now able to display 3 @ 2560x140.