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HP Recommended
Thunderbolt Dock G2
Microsoft Windows 10 (64-bit)

Hi there, 

 

I have just purchased a Thunderbolt Dock G2 to use with a HP EliteBook 840 G5 that I have from work. Connected to the dock currently are 2 x Asus VP28UQG that support 4K @ 60Hz over DisplayPort 1.2.

 

Currently the monitors are working fine at 30Hz, but not at 60Hz

 

According to the Dispplay Capabilities Guide (http://www8.hp.com/h20195/v2/GetPDF.aspx/4AA7-3384ENW.pdf), the supported configuration is for 2 x 4K @ 60Hz is either : 

 

1 DP + 1 TB port

or 
1 USB Type-C™ Alt mode port + 1 TB port

 

Does this mean I need to get something like one of these products to get both monitors to show at 60Hz?

Thunderbolt 3.0 to DisplayPort adapter: https://www.amazon.co.uk/dp/B01EPU7R4M/

UCB-C to DisplayPort Cable: https://www.amazon.co.uk/dp/B075V27G2R/

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

you are correct... the DP 1.2 hub in the dock that support both DP ports does not have the bandwidth to run 2 4k monitors at 60HZ... you need to obtain an USB-C to DP or HDMI adapter to get the 2nd monitor to also run at 60HZ... the first monitor would be connected to one of the DO connectors

 

HP sells a USB-C to DP or HDMI adapter that is tested and fully supported

I work for HP. However, all opinions and comments are my own.

View solution in original post

14 REPLIES 14
HP Recommended

you are correct... the DP 1.2 hub in the dock that support both DP ports does not have the bandwidth to run 2 4k monitors at 60HZ... you need to obtain an USB-C to DP or HDMI adapter to get the 2nd monitor to also run at 60HZ... the first monitor would be connected to one of the DO connectors

 

HP sells a USB-C to DP or HDMI adapter that is tested and fully supported

I work for HP. However, all opinions and comments are my own.
HP Recommended

Thanks Soccer_dan,

 

I went and got the USB-C to DP adapter (https://www.amazon.co.uk/dp/B01EPU7R4M/) and it work a treat!

HP Recommended

Did you have to make some configuration changes to get this to work? I have a monitor connected to a display port, and another connected to the USB-C port. The display port gets to 4K @ 60 Hz, but the USB-C monitor only displays up to 1080p at 60Hz.

HP Recommended

 

 

The_Fossette
I am an HP Employee

HP Recommended

only one of the usb-c ports will support a usb-c to dp or hdmi adapter and 4k resolution... make sure you use a quality adapter and connect it to the appropriate port

I work for HP. However, all opinions and comments are my own.
HP Recommended

I’m using 2 HP Z27 4K monitors. One is connected to the dock directly to the DP using a DP TO DP cable. The other is connected to the USB-C display port alternative using a USB-C to USB-C cable. Both cables were packaged with the HP monitors.

HP Recommended

please, use a usb-c to DP or HDMI adapter to get the 4k/60Hz resolution you need... i am not sure you can do that with usb-c to usb-c cable 

I work for HP. However, all opinions and comments are my own.
HP Recommended

Oh, you meant Thunderbolt USB-C to DP adapter, and connect it to the Thunderbolt port on the dock and DP on the monitor.

HP Recommended

sorry i wasn't clear enough

 

1st monitor connects to dock via dpdp cable on a DP port

2nd monitor connects to dock's usb-c port via usb-c to dp or hdmi adapter , then a dp or hdmi cable to monitor

I work for HP. However, all opinions and comments are my own.
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