Elitebook 840 G3 Display Port maximum resolution applies to single monitor or both of them in total?

[MP23]

Hi,

its documentation states that

DisplayPort - Supports resolutions up to 4096 x 2160 at 60 Hz

Does it mean that both DisplayPorts in UltraSlim Docking Station can use this resolution so I can have two panels each up to this resolution (eg two 2560x1440 or two 4096 x 2160 etc)  or is it limit of sum of both monitors resolution and it wont work because

2560 + 2560 = 5120 is higher than  4096

and 1440 +1440 = 2800 which is higher than 2160?

Thanks for advice.

[y2ken · Accepted solution]

It's a matter of bandwidth. The spec I saw for the Ultra Slim Docking Station shows that it uses the Display Port 1.2 standard which supports a maximum bandwidth of 17.28 Gbits/sec. Most docks and display port hubs share bandwidth so you need to determine the bandwidth the two monitors combined will use. Here is a bandwidth calculator.

In the example you gave each 2560x1440 @ 60hz monitor will use 6.6 Gbps.  x2 = 13.2 Gbps which is lower than the 17 Gbps max of the Display Port 1.2 standard.

So it should work but I hesitate to guarantee that it will work. 

There may be some other parameter I haven't thought of. 

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