Cannot get 4K at 60Hz

[tallnutt]

Hi,

HP Zbook Firefly 15 G7 Mobile Workstation Intel(R) Core(TM) i7-10810U CPU @ 1.10GHz 1.61 GHz, 64Gb RAM. NVIDIA Quadro P520.

this new laptop should be more than capable of 4k @ 60 Hz. I have tried two monitors (both 4k 60Hz capable) through every port, but the display adapter will not show more than 30Hz. I am currently using an Philips 288B. I have tried DP cables and HDMI 2.

Also does anyone know how to actually contact support without whatsapp?

Thanks,

T.

[banhien]

@tallnutt 

From page 3 (near bottom page) of its Maintenance and Service Guide

            http://h10032.www1.hp.com/ctg/Manual/c06685332.pdf

It ONLY has HDMI 1.4 therefore you won't get 4k @ 60Hz.

Regards.

[tallnutt]

I just realized that.. terrible for a high end machine. I think the usb c might work with a dp adapter. I have ordered one to try it.

[iomare · Accepted solution]

I believe you should be able to get 60 Hz through the USB-C Thunderbolt port  with a USC-C to DP adapter.

Hope it helps,

David

[iomare]

add

"Supports HD Decode, DX12, and HDMI 1.4b, HDCP 2.3 via DisplayPort up to 4 K @ 60 Hz and via HDMI up to 4 K @ 30 H"

[tallnutt]

I used a USB C to DP adapter, direct to monitor and got 60Hz 4k. It's disappointing it can't do it through hdmi.

Thanks for the help.

T.

[iomare]

You're welcome.

Yes I understand what you mean. IT is even more confusing with USB-C ports as only ones which have DP alt mode (such as yours) will support the USB-C to DisplayPort without needing an external converter (video card)

So loads of people buy the USB-C to HDMI or DisplayPort and it just doesn't work.

Anyway glad you got it sorted.

Take care,

David

https://www.youtube.com/watch?v=O3sXlRZxPRY