2 Replies Latest reply on Dec 16, 2017 4:04 PM by SolidWorker

    Dell Precision 5520 Can't Output to 4K @ 60Hz via Thunderbolt 3?


      Hello all,


      I have recently been trying to use an LG 40UB8000 as a monitor for my dell precision 5520 (Intel 630 + Quadro M1200), and I seem to be limited to 30Hz at 3840X2160.


      I am using a Thunderbolt 3 > HDMI adapter and HDMI 2.X cable, both of which are advertised and confirmed by customer reviews to support 4K@60Hz.


      When using the pre-installed "dell approved" graphics drivers, I am only able to select 30Hz, and the "custom resolution" section is not available by default in the Intel Graphics Control Center (dell doesn't update this automatically so you have to do it manually).


      After manually installing the latest Intel graphics driver via device manager, I now have the option to set a custom resolution, but when I put in the 4K@60Hz options and hit "add", there is a dialog box which reads "the custom resolution exceeds the maximum bandwidth capacity".


      I know that the TB3 port on my computer is capable of this 4K60, as I am able to output 4K60 on an actual monitor via the DisplayPort (it does this automatically without any custom resolution nonsense), so I have no idea where the bandwidth bottleneck is.



      I may try returning the TB3 adapter to Amazon and try another one, so if anybody has a suggestion for one that is confirmed to work this would be greatly appreciated.