HP Usb C dock 5 Triple Monitor Resolution Support

[njn22]

Unable to get the 5120 x 1440  resolution with the primary monitor  when 3 monitors are connected. Getting the desired 5120x1440 resolutions  when only 2 monitors are connected to the dock.

Following setup : 

Connecting HP Elitebook 850 G7 to Dock G5.

Getting following resolutions  for below connections:

DP1 to Monitor 1 DP at 3840x1080 

DP2 to Monitor 2 DP at 1080x1920

Hdmi to Monitor 3 HDMI at 1920x1080

The moment 3 monitors are connected ,  monitor 1 is at 3840x1080 and looses the resolution 5120x1440

Only solution found so far: Instead of using DP2 to Monitor2 DP , if i use an usb c to DP port cable directly from Elitebook to Monitor2 

This way resolution is available for monitor 1 at 5120x1440 and i can work with 3 monitors.

From below article i understand triple 4k displays are supported (4K on both DP ports (D1) and 4K on
HDMI)

 Any ideas why in my case the resolution is going below 5120x1440 for monitor 1 w

HP Dock Solutions

[banhien]

@njn22 

The dock supports

       

One thing I'd like to make : Do you use right cables ? Please note: refresh rate goes up , resolution will go down.

Regards.

[njn22]

Ok . So cables are not the problem in my understanding. As i mentioned in the post , 

With the same cable, i get 5120x1440 resolution in Monitor 1 when monitor 2 is unplugged.

So how come this could be a cable issue ? 

[njn22]

So i bought this cable from cable matters and plugged in from the display port to the HDMI port of the monitor.( instead of using the display port to display port cable that came along with the monitor)  

Cable Matters Unidirectional DisplayPort to HDMI Cable (DP to HDMI, DisplayPort to HDMI Adapter Cabl...

There is a difference now. I am able to get 5120x1440p resolution for monitor 1 which i was trying to get.

But the monitor 2 which is connected with the new cable (dp to hdmi) is only giving 1280x720 resolution. 

How can i improve the resolution for monitor2 in this case, to get up to 1080x1920 

Current configuration : 

Monitor 1 Display port to Display port dock - 5120x1440 ( DP to DP cable that came with monitor)

Monitor 2 HDMI to Display Port dock - 1280x720 ( DP to HDMI bought from amazon , cablematters)

Monitor 3 HDMI  to HDMI dock  - 1920x1080 - 1080x1920 (hdmi to hdmi cable that  came with monitor) 

[banhien]

@njn22 

>>> But the monitor 2 which is connected with the new cable (dp to hdmi) is only giving 1280x720 resolution. 

That is the culprit, you need a right cable as I said from the beginning.

Regards.

[njn22]

Please help me understand what is right cable . I just bought the best available cable option and that gives me only 1280x720.

So which cable should i buy now ( if Cablematters is not a great brand to support the best display) 

[banhien]

@njn22 

Please use DP NATIVE cable

Regards.

[njn22]

still can't understand. Do you mean to buy a DP to DP cable from NATIVE brand or 

DP to HDMI cable from Native Brand 

or something else  ?

[banhien]

---

@njn22 wrote:

 a DP to DP cable

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@njn22 

That is what I meant

Regards.

[njn22]

thats what i had earlier , DP to DP for monitor 2 but then in that setup i lost 5120x1440 resolution in monitor 1.

Hence i bought the new cable (DP to HDMI for monitor 2 ) but surprisingly i got 5120x1440 resolution back in monitor 1 but lost 1920x1080 resolution of the monitor 2. 

Also, googling around , i couldn't find a DP to DP cable from NATIVE brand if thats what you were referring to that i should try next . 

Please be kind to help with a link if this is what you meant and i will be happy to purchase the same and try this .