Can't increase refresh rate to 120 hz on external monitor connected to my OMEN by HP 15-dc0005ne

[Doktor107]

I bought new gaming monitor supporting 120hz on HDMI and 144 hz on DP. I tried connecting the monitor using USB-C and HDMI cable (2.1) and the refresh rate is only 60 hz.

Any solutions?

Thanks in advance

[banhien]

@Doktor107 

Its specs

           https://support.hp.com/ph-en/document/c06068786

It has

• 1 USB 3.1 Type-C™ Gen 1 (Data Transfer up to 5 Gb/s, DP1.2, HP Sleep and Charge);
• 3 USB 3.1 Gen 1 (1 HP Sleep and Charge);
• 1 HDMI;
• 1 RJ-45;
• 1 headphone/microphone combo

Just have a look:

• The HDMI port which is NOT HDMI 2.0, only gives 1920 x 1080 @ 60Hz
• The USB-C port gives you DP 1.2 resolution and higher refresh rate using USB-C connection (no middle man) BUT DisplayPort 1.2 offers a maximum total bandwidth of 21.6 Gbps and the USB-C port on your machine only gives Data Transfer up to 5 Gb/s.

Now you can see where the problem is.

Hope this makes sense.

Regards.