I cannot set 3440x1440 resolution (UHD 620 - ASUS UX333)

Francoise — Fri, 14 Nov 2025 08:39:38 GMT

I don't succeed to have have max resolution 3440x1440 , only 1920x1080 is display in the list.

My configuration is :

ASUS ZenBook UX333FA

HDMI 1.4

Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz 1.80 GHz

UHD Graphics 620

Driver version : 31.0.101.2137

Screen : Viewsonic VA3420C (max resolution 3440 x 1440 - 120hz)

I connect the screen to PC with a HDMI cable.

I run Intel SSU but don't know how to use information

I'm on Windows 11
I tried to add manually a custom resolution (3440 x 1440 - 60hz) from Intel control panel, but didn't succeed.

Thank your for your help.

Re: I cannot set 3440x1440 resolution (UHD 620 - ASUS UX333)

MUC — Fri, 14 Nov 2025 22:51:18 GMT

ViewSonic VA3420C
Supported modes are listed on page 31

1 x DisplayPort 1.2 HBR2
2 x HDMI 2.0 TMDS (600 MHz)
1 x USB-C with DisplayPort 1.2 HBR2

ASUS Zenbook 13 UX333

1 x HDMI 1.4 (300 MHz)

This is a Coffee Lake (8th Gen) platform. In this case, the HDMI output is only designed for up to 300 MHz TMDS. The HDMI output is also the only video output on this laptop.

If we assume that the monitor uses VESA Coordinated Video Timing - Reduced Blanking (CVT-RB), then:

3440 x 1440 @ 60 Hz = 319.75 MHz TMDS
Unfortunately, the laptop cannot support this.

To see what is possible, please run edid-test.exe:

https://www.monitortests.com/edid-test.zip

This will create a file named "edid-test.txt" in the same folder. Please attach this TXT file here.

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I cannot set 3440x1440 resolution (UHD 620 - ASUS UX333)

Re: I cannot set 3440x1440 resolution (UHD 620 - ASUS UX333)