1 Copper

U2520D, U3818DW, MST daisy chain?

Hello,

I currently own a 27” LG monitor and a U3818DW, but would like to replace the LG with a Dell for the Display Manager and daisy chain. My question is about affects in resolution by running my Lenovo T480 -> TB3/USB-C -> a lower resolution monitor like the U2520D’s 2560X1440 and then DP/mDP -> a higher resolution 3840X1600. Would the primary monitor cap the resolution to its native resolution, or would it pass through as much as possible?

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Community Manager
Community Manager

Re: U2520D, U3818DW, MST daisy chain?

That configuration was never tested by us, so unknown. We never even thought about such a combination. The U3818DW User's Guide doesn't show any multiple monitor configurations. The U2520D User's Guide page 34 has this stipulation =  The maximum number of supported monitors via MST is subjected to the bandwidth of the USB-C source.

 

IF the Lenovo Lenovo T480 TB3/USB-C can provide the necessary bandwidth, then possible. You will need to post on the Lenovo Forum and ask the users there if the Lenovo T480 TB3/USB-C could actually push the U2520D 2560X1440 60Hz plus the U3818DW 4K 3840x1600 60Hz.


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3 Argentium

Re: U2520D, U3818DW, MST daisy chain?

FWIW, I have a Lenovo C940 daisy chained via TBT3 to a U2520D and a U4320Q. Both monitors run at native resolution: 2560x1440 and 3840x2160.

Not exactly the same config as your T480 which is, I think, an 8G Intel w. discrete TBT3 controller where the C940 is 10G w. integrated TBT3, but I don't know if that changes the total bandwidth Chris asked about.

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Community Manager
Community Manager

Re: U2520D, U3818DW, MST daisy chain?

As always, thanks for the assist!

 

In addition to the USB Type-C to C cable, does your Lenovo C940 have its own AC power adapter attached? Or is it getting all power from the U2520D?


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3 Argentium

Re: U2520D, U3818DW, MST daisy chain?

It has its own power adapter, which connects to 1 of the 2 TBT3 ports, but it can be powered by the U2520 as well.