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BBot
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Solved!

HP Z32 30 Hz in 4K resolution

HP Z32 4K UHD Display
Microsoft Windows 10 (64-bit)

Please help. I have HP EliteBook 830 G5 connected to USB-C G4 port replicator which connected to to HP Z32 4K UHD display.

Monitor works only in 30 Hz in 4K resolution.  Monitor menu show optimal resilution as 60Hz but it set to 30Hz.

I connect monitor with certified HP DisplayPort cable HP 917463-0011850 (HOTRON E246588).

BIOS, video driver and dock firmare updated to latest but refresh rate still only 30 HZ.

But.. when I connect monitor with Thunderbolt cable directly to the laptop it works in 60Hz 

Please give me advise .

Thak you.

 

Regards,

BBot
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HP Recommended

Solved!

HP Z32 30 Hz in 4K resolution

@BBot 

 

The dock supports

 

 
Single display
Up to 3840 x 1440 at 60 Hz
Dual display
Up to 1920 x 1200 at 60 Hz
Triple display
Up to 1680 x 1050 at 60 Hz

 

Its specs

 

     https://support.hp.com/au-en/document/c05861464

 

The simple math answer: The monitor has 3840 x 2160 @ 60Hz native resolution therefore to display UHD (4K) on the monitor, the dock will reduce the refresh rate and next available  rate is 30Hz

 

Regards.

BH
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BBot
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HP Recommended

Solved!

HP Z32 30 Hz in 4K resolution

Thank you Banhien! 

I will re-order compatible to 4K resolution docking stations

https://support.hp.com/au-en/product/hp-usb-c-universal-dock-non-flash/19530739/document/c05849437

Regards,

BBot
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