Asus XG27AQDMG Discussion

[RealNC]

I did open the extension block. It's the 3rd screenshot from the top. I double clicked the only extension block (CTA-861). When I did this, it opens up a list of detailed resolutions. Only one resolution is listed: 2560x1440 * 119.997 HZ. This is after I used the reset-all.exe file and the restart64.exe file.

Maybe it's in the "TV resolutions" of the extension block?

[kurtdh]

I did open the extension block. It's the 3rd screenshot from the top. I double clicked the only extension block (CTA-861). When I did this, it opens up a list of detailed resolutions. Only one resolution is listed: 2560x1440 * 119.997 HZ. This is after I used the reset-all.exe file and the restart64.exe file.

Maybe it's in the "TV resolutions" of the extension block?

It's not listed there either. I only see 4k going up to a max of 120hz:

https://imgur.com/a/hF85tHQ

[RealNC]

It's not listed there either. I only see 4k going up to a max of 120hz:

https://imgur.com/a/hF85tHQ

That's a mystery to me. Export the EDID as txt and attach it here. I'll take a look at it.

[kurtdh]

It's not listed there either. I only see 4k going up to a max of 120hz:

https://imgur.com/a/hF85tHQ

That's a mystery to me. Export the EDID as txt and attach it here. I'll take a look at it.

Ok I found out if I used a Displayport cable instead of an HDMI cable, it now shows "DisplayID 1.3: 1 data block" under Extension blocks. When I double click that, there's 5 resolutions listed under that, one of which is 3840x2160 @ 239.999 Hz. This isn't the best solution for me since HDMI provides higher bandwidth and allows 12 bit color as well...

How come it properly detects it with DisplayPort, but not HDMI? Do you still want an export of the EDID? If you do, do I just click "export" in the bottom left and export it as a BIN file? And do I need to do that while it's hooked up to DisplayPort or can I do it while it's hooked up to HDMI as well?

[RealNC]

Ok I found out if I used a Displayport cable instead of an HDMI cable, it now shows "DisplayID 1.3: 1 data block" under Extension blocks. When I double click that, there's 5 resolutions listed under that, one of which is 3840x2160 @ 239.999 Hz. This isn't the best solution for me since HDMI provides higher bandwidth and allows 12 bit color as well...

How come it properly detects it with DisplayPort, but not HDMI? Do you still want an export of the EDID? If you do, do I just click "export" in the bottom left and export it as a BIN file? And do I need to do that while it's hooked up to DisplayPort or can I do it while it's hooked up to HDMI as well?

Sorry, I have no idea what to do in this case. You can experiment with using your modified EDID with HDMI. It might work, or it might not. So basically once you fix the VRR flicker with DisplayPort, export the EDID, switch to HDMI, and if that causes your EDID override to disappear, import the EDID you exported previously and see if that works.

[kurtdh]

Ok I found out if I used a Displayport cable instead of an HDMI cable, it now shows "DisplayID 1.3: 1 data block" under Extension blocks. When I double click that, there's 5 resolutions listed under that, one of which is 3840x2160 @ 239.999 Hz. This isn't the best solution for me since HDMI provides higher bandwidth and allows 12 bit color as well...

How come it properly detects it with DisplayPort, but not HDMI? Do you still want an export of the EDID? If you do, do I just click "export" in the bottom left and export it as a BIN file? And do I need to do that while it's hooked up to DisplayPort or can I do it while it's hooked up to HDMI as well?

Sorry, I have no idea what to do in this case. You can experiment with using your modified EDID with HDMI. It might work, or it might not. So basically once you fix the VRR flicker with DisplayPort, export the EDID, switch to HDMI, and if that causes your EDID override to disappear, import the EDID you exported previously and see if that works.

Ok I'll give it a shot. I'm still not sure I'm editing the resolution correctly. When I double click display id 1.2 and double click detailed resolutions and then select the 3840x2160 239.999 hz mode, I changed its hertz to 79 just to test it out. I clicked ok a few times, used restart64.exe, and my windows was still at 240hz. Are there any additional steps I need to take to make sure these settings stick? Because it doesn't seem to be sticking.

[RealNC]

Ok I'll give it a shot. I'm still not sure I'm editing the resolution correctly. When I double click display id 1.2 and double click detailed resolutions and then select the 3840x2160 239.999 hz mode, I changed its hertz to 79 just to test it out. I clicked ok a few times, used restart64.exe, and my windows was still at 240hz. Are there any additional steps I need to take to make sure these settings stick? Because it doesn't seem to be sticking.

You also need to actually apply your changes by exiting CRU with "OK". Pressing OK in other dialogs doesn't do anything other than confirm you changes, but those are not applied until you exit CRU itself with OK.

[kurtdh]

Ok I'll give it a shot. I'm still not sure I'm editing the resolution correctly. When I double click display id 1.2 and double click detailed resolutions and then select the 3840x2160 239.999 hz mode, I changed its hertz to 79 just to test it out. I clicked ok a few times, used restart64.exe, and my windows was still at 240hz. Are there any additional steps I need to take to make sure these settings stick? Because it doesn't seem to be sticking.

You also need to actually apply your changes by exiting CRU with "OK". Pressing OK in other dialogs doesn't do anything other than confirm you changes, but those are not applied until you exit CRU itself with OK.

Yes that's what I did. I pressed ok continually until exiting CRU. I then used restart64, but my refresh rate remained at 240hz despite reducing it in CRU. I don't need to re-select the refresh rate in display settings or anything do I?

[RealNC]

Here, it just works. Sorry. Don't know why it doesn't work for you :-/

[kurtdh]

Here, it just works. Sorry. Don't know why it doesn't work for you :-/

I received this reply from the CRU dev, FYI:

Can anyone help? I have a FO32U2P 4k 240hz OLED monitor. In display settings I have my desktop successfully set to 4k 240hz, however when I load CRU 1.5.2, my monitor isn't listing any 240hz modes. Screenshot is attached. How can I have it detect a 240hz mode so I can edit it correctly?

https://imgur.com/a/hF85tHQ

EDIT: I figured out using a DisplayPort cable instead of a HDMI 2.1 now shows "Display ID 1.3: 1 data block" under extension blocks and properly shows the 4k 240hz resolution. How come CRU detects it properly with a DisplayPort cable but not an HDMI 2.1 cable? I would much prefer to use HDMI 2.1, so if any of you could provide assistance or a fix to have it detect properly with HDMI 2.1?

The issue is there is a hidden extension block because of the extension override data block that HDMI 2.1 introduced, which complicates extension block handling because now there are two places to determine the extension block count. Last time I looked into implementing this, NVIDIA's driver was broken and wasn't reporting the EDID correctly, which complicated matters. That issue might have been fixed since you can read the first extension block, but last I heard, NVIDIA's driver has another issue that causes EDID overrides to be ignored if display stream compression is active, which 4K @ 240 Hz would require. I do plan to implement the extension override data block, but I don't have the hardware to test if any of this is fixed.