i want 144hz @ 1920x1080 capability on Intel UHD Graphics 620

[meemeemow]

I have a 144hz acer xb253q monitor, but my laptop has an Intel UHD 620 graphics card and won't allow me to set the refresh rate past 120hz. Theoretically, it should be able to do 144hz as it can do 4k @ 60hz. Can someone please help me get 144hz capability? it would be much appreciated.

[MUC]

Please run the Intel System Support Utility for Windows and perform a scan for all options. Attach the output file here.

Please also create a Report for Intel Graphics Drivers and attach the file here.

[meemeemow]

here u go. ty for the help btw 🙂

[MUC]

ASUS VivoBook S14 S406UA is a Kaby Lake platform with a rare micro HDMI port. According to the technical data from ASUS, it is HDMI 1.4 (4K @ 30 Hz). This also corresponds to the state of the art in this generation/product segment.

According to the diagnostic reports, two display devices are connected to the graphics adapter:

• The built-in screen (BOE Technology Group NV140FHM-N62)
• An Acer Predator XB253Q monitor (2x HDMI 2.0, 1x DisplayPort 1.2)

The monitor reports 4K @ 60 Hz UHDTV (VIC 97) as the highest supported resolution. In my opinion, this data sent by the monitor via the HDMI cable is factually incorrect since the panel itself supports a maximum resolution of 1920 x 1080 (Full HD). In accordance with the technical data from the manufacturer's website, the data via the HDMI cable also show the highest dedicated resolution:

Detailed Timing Descriptor:

This is Coordinated Video Timing - Reduced Blanking (CVT-RB).

1080p @ 144 Hz RGB 8-bit CVT-RB = 102 % HDMI 1.4

1080p @ 120 Hz RGB 8-bit CVT-RB = 84 % HDMI 1.4

Nevertheless, you can try if the monitor would also handle CVT-RB v2:

1080p @ 144 Hz RGB 8-bit CVT-RB v2 = 98 % HDMI 1.4

• Download Custom Resolution Utility (CRU)
• Run CRU.exe
• Make sure the active EDID is that of the Acer XB253Q monitor connected to your laptop. If necessary, select from the drop down menu.
• Proceed as follows:

Change the Timing to "CVT-RB2 standard" and close all windows with OK and restart the computer.

If this measure does not cause 144 Hz to appear in the Windows display settings, we need to try something else.

[meemeemow]

this did not work this is what i see. 

[MUC]

Then please try this. Delete the 144 Hz entry from the CTA-861 block.

Add a new DisplayID:

Be careful to choose "CVT-RB2 standard".

Close all CRU windows with OK and restart the computer.

Please note that it is quite possible that the monitor cannot process this timing correctly and is therefore flickering. In this case, unfortunately, there is nothing else you can do.

[MUC]

You can undo any changes by doing this:

This will delete all EDIDs in the Windows registry. Then when you restart the computer, the connected displays will be recreated with their default settings.

[meemeemow]

It still did not work, thank you so much for your help though :D. However, something changed in my settings. in settings the highest possible resolution that I was able to set the monitor to was 1920x1080p and now it's 3840x2160p(4k). but the monitor does only support 1080p xD. but yes you are right, to try it out I set the monitor to 4k but the refresh rate was 30. this was the notification when i restarted: 

[meemeemow]

should i accept this as a solution? because you have done all you can to help me.

[MUC]

It's too bad that 144 Hz is not displayed for selection in the Windows display settings, even though you have created a dedicated DisplayID. Will it stay that way if you remove the TV resolutions from the CTA-861 block completely?

[meemeemow]

all that happened when i did thats was thats i could not set the monitor oast 60hz. but then i just reset the graphics card to set it to default. then i tried both of the 2 ways u listed before and it still did not work. but i do have my 120hz back.

[meemeemow]

*that

[meemeemow]

now can i accept this a a solution?

[MUC]

Unfortunately, we were not able to really solve your problem. I would therefore not mark as solution. However, the thread will still be visible to anyone looking for solutions and the methods shown may work with other hardware. I simulated the steps shown on my NUC11 with Iris Xe and the method with the DisplayID worked. However, this remains to be confirmed using a real 1080p 144 Hz monitor.

[meemeemow]

tysm anyways. i will likely use this in the future on other laptops and/or pc's if i upgrade.

[GouthamN]

You can try via DP instead of HDMI:

According to the technical data from ASUS shared by someone else, The laptop also has a type c port. You can get a Type c to dp cable and you might get144Hz . Because with display port(DP) it might be possible to drive 19x10@144hz RGB (CVT RB):

Try this experiment also with HDMI:

Apply 120Hz, go to IGCC(Intel graphics command center), set YUV420 color format instead of RGB

Then open display settings page, and see if 144Hz is listed now.

Note: Panel's EDID should have YUV420 support for this particular mode.

Ideally if it had, you should have seen 144Hz support by default. If not, it might be a bug. To confirm, please try this experiment.

[MUC]

Please note that the USB-C port on ASUS VivoBook S14 S406UA does not tunnel a DisplayPort signal. You cannot connect a monitor to it.

Changing color model to YCbCr 4:2:0 for HDMI signal would reduce the necessary bandwidth by half. This is an option, but in my opinion it is no better than 1080p @ 120 Hz RGB for a monitor due to the non-pixel-accurate rendering. However, for a TV for watching cine films and videos, YCbCr 4:2:0 would actually be an advantage, as the freed-up bandwidth can then be used for a higher bit depth instead (HDR10). But HDMI 1.4 on Kaby Lake doesn't support HDR anyway.

[MUC]

In the efforts described above, we assumed that the maximum pixel clock is 340 MHz, as stated in the HDMI 1.4 specification. I now have reason to believe that the pixel clock on UHD6x0 HDMI PHY is limited to 300 MHz by Intel and therefore cannot be exceeded. There is nothing CRU can do about this.