Custom Resolution Utility (CRU)

[Phayte]

The monitor I have is the Acer Nitro XF3 series (XF273). I have a GTX 1660. When I got this monitor CRU hasn't been working. I would change my resolution then I would restart my computer but then this is where the problem starts. Everytime my computer would turn on it would stay on for about 1 minute then it would go black, my computer would still be on it would just be a black screen. I would have no other option but to cut power off from my computer, and it would keep doing this everytime I would turn on my computer. Until windows will give me a blue screen saying that I need to reset my computer and I have reset and trying CRU about 6 times and it hasn't worked. On my old monitor it worked perfectly fine. I was asking so I didn't have to return this monitor and get a new one.

[chipzen]

I'm trying to set a resolution that I used on my Nvidia GPU before (1920x1440 on a 1080p monitor), but on AMD, it won't work. So I tried CRU, but when I try to set the refresh rate to 240, it goes red and I can't press ok. Any idea why? Super resolutions work just fine at 240Hz so I don't understand at all. Any sort of response will be appreciated, thanks.

P.S. If you ask me why I want to use the resolution, it's for gaming. I don't need to hear your opinions on whether or not I should use the res because I have gotten enough of those elsewhere.

[ToastyX]

(11-27-2021 04:28 PM)chipzen Wrote:  I'm trying to set a resolution that I used on my Nvidia GPU before (1920x1440 on a 1080p monitor), but on AMD, it won't work. So I tried CRU, but when I try to set the refresh rate to 240, it goes red and I can't press ok. Any idea why? Super resolutions work just fine at 240Hz so I don't understand at all. Any sort of response will be appreciated, thanks.

This is explained in the first post.

[ToastyX]

(11-25-2021 06:12 AM)Phayte Wrote:  The monitor I have is the Acer Nitro XF3 series (XF273). I have a GTX 1660. When I got this monitor CRU hasn't been working. I would change my resolution then I would restart my computer but then this is where the problem starts. Everytime my computer would turn on it would stay on for about 1 minute then it would go black, my computer would still be on it would just be a black screen. I would have no other option but to cut power off from my computer, and it would keep doing this everytime I would turn on my computer. Until windows will give me a blue screen saying that I need to reset my computer and I have reset and trying CRU about 6 times and it hasn't worked. On my old monitor it worked perfectly fine. I was asking so I didn't have to return this monitor and get a new one.

I haven't heard of a delayed reaction like that before. If the computer is crashing, then it's a driver bug. What changes are you making with CRU?

[Sperious]

I just bought my first ultrawide monitor, the AOC cu34g2x. I run it at 144Hz together with two 1080p monitors at 144Hz as well. All using DP.

When activating G-Sync on the primary ultrawide I unfortunately get the dreaded flickering when FPS drops, typically during game loading screens and menus. In game it’s mostly fine.

After doing a lot of reading through Google and Reddit, I decided to try to change the adaptive rate range of the monitor from its native 48-144Hz to 80-144Hz.

However, when using CRU, the only “Detailed resolutions” that are reported are 59.972Hz and 99.981Hz. The 144Hz I’m running is not one of the detailed resolutions reported in CRU.



I have tried to press “Edit” and change the V rate anyway, but the flickering persists and my OSD frame counter clearly shows that the monitor dips down to around 48-60Hz those times that the flickering shows.

So, it seems that the changes I make using CRU is not actually implemented. I have run Restart64 and also rebooted several times to no avail.

Another weird thing is that my two identical 1080p monitors show different “Detailed Resolutions” in CRU. One shows only 60Hz while the other one shows 60Hz and 144Hz.





In Nvidia control panel all three monitors are set to 144Hz. In Windows screen settings one of the 1080p monitors is reported running at 144Hz while the other two monitors, including my primary ultrawide, is reported running at 144.001Hz. Could this be the reason that 144Hz is not shown among the detailed resolutions in CRU?

I’m not sure how to make my monitor respect the 80-144Hz range I’m trying to set in CRU, to hopefully get rid of the flickering.

[ToastyX]

(11-28-2021 12:34 AM)Sperious Wrote:  However, when using CRU, the only “Detailed resolutions” that are reported are 59.972Hz and 99.981Hz. The 144Hz I’m running is not one of the detailed resolutions reported in CRU.

https://i.ibb.co/845hmZ9/extension.png

I have tried to press “Edit” and change the V rate anyway, but the flickering persists and my OSD frame counter clearly shows that the monitor dips down to around 48-60Hz those times that the flickering shows.

So, it seems that the changes I make using CRU is not actually implemented. I have run Restart64 and also rebooted several times to no avail.

Both issues are explained in the first post under extension blocks.

(11-28-2021 12:34 AM)Sperious Wrote:  Another weird thing is that my two identical 1080p monitors show different “Detailed Resolutions” in CRU. One shows only 60Hz while the other one shows 60Hz and 144Hz.

https://i.ibb.co/h7GsnZy/24a.png

https://i.ibb.co/hdf0NQK/24b.png

In Nvidia control panel all three monitors are set to 144Hz. In Windows screen settings one of the 1080p monitors is reported running at 144Hz while the other two monitors, including my primary ultrawide, is reported running at 144.001Hz. Could this be the reason that 144Hz is not shown among the detailed resolutions in CRU?

No, it should be in the extension block. Either the monitors are different revisions, or some setting is different on one of them, such as G-SYNC being disabled.

[Phayte]

(11-27-2021 06:03 PM)ToastyX Wrote:  

(11-25-2021 06:12 AM)Phayte Wrote:  The monitor I have is the Acer Nitro XF3 series (XF273). I have a GTX 1660. When I got this monitor CRU hasn't been working. I would change my resolution then I would restart my computer but then this is where the problem starts. Everytime my computer would turn on it would stay on for about 1 minute then it would go black, my computer would still be on it would just be a black screen. I would have no other option but to cut power off from my computer, and it would keep doing this everytime I would turn on my computer. Until windows will give me a blue screen saying that I need to reset my computer and I have reset and trying CRU about 6 times and it hasn't worked. On my old monitor it worked perfectly fine. I was asking so I didn't have to return this monitor and get a new one.

I haven't heard of a delayed reaction like that before. If the computer is crashing, then it's a driver bug. What changes are you making with CRU?

I am adding (1650x1080 & 165hz) as a detailed resolution then moving it above the default resolution (1920x1080 & 143.854hz) and deleting all of the Extension Blocks. If it is a driver bug where can I update or resolve the problem. I don't know if this is a problem but I'm using the Display Port, because I thought it was a HDMI issue but it isn't.

[Sperious]

(11-28-2021 04:08 AM)ToastyX Wrote:  Both issues are explained in the first post under extension blocks.

I’m really sorry if I seem ignorant or uninformed but this is all very new to me and quite overwhelming. I’ve read the extension block information in the first post but I’m still not sure what to do.

Again, here is what I see with my monitor:



There is no 3440x1440@144Hz under detailed resolutions and I can’t find it under Extension Blocks either. There are no DisplayID extension records.

(09-07-2012 09:06 PM)ToastyX Wrote:  [*]NVIDIA: CRU can only read the first extension block because the driver has a bug that prevents reading additional extension blocks. NVIDIA also does not support default extension blocks, so delete any default extension blocks and add one manually if needed. The second extension block is usually a DisplayID extension block with detailed resolutions greater than 655.35 MHz pixel clock such as 1920x1080 @ 360 Hz and 2560x1440 @ 165 Hz.

I don’t understand how I am supposed to access any potential second extension block containing additional detailed resolutions? I have tried deleting the greyed out “Default Extension Block” and restarted using Restart64 but that didn’t change anything. I have tried adding another one manually but it isn’t populated with any new data.

Am i supposed to add a new detailed resolution under the DisplayID section of my newly created Extension Block?

(09-07-2012 09:06 PM)ToastyX Wrote:  Extension blocks:

• Extension block types:
  • CTA-861 extension blocks can contain additional detailed resolutions and data blocks such as TV resolutions and HDMI support. Note: NVIDIA requires at least 2 bytes left for data blocks or the driver will ignore all changes.

I’m not sure how to confirm if there are at least 2 bytes left for data blocks in order for my Nvidia card to not ignore the changes I make?

All in all, i have read all the information in the first post numerous times but I’m still not sure how to reach my objective:

To limit the adaptive sync range to 80-144Hz when using my monitor in 3440x1440@144hz.

I’m sorry if I’m thick but any help would be greatly appreciated.

[ToastyX]

(11-28-2021 11:22 AM)Sperious Wrote:  I don’t understand how I am supposed to access any potential second extension block containing additional detailed resolutions? I have tried deleting the greyed out “Default Extension Block” and restarted using Restart64 but that didn’t change anything. I have tried adding another one manually but it isn’t populated with any new data.

Am i supposed to add a new detailed resolution under the DisplayID section of my newly created Extension Block?

Like it says, the second extension block is usually a DisplayID extension block, but CRU can't read it, so it appears as a default extension block, and because of an NVIDIA driver bug, you will have to delete the default extension block and add a DisplayID extension block manually (use DisplayID 1.3). Then you have to add 3440x1440 @ 144 Hz in the DisplayID extension block.

(11-28-2021 11:22 AM)Sperious Wrote:  I’m not sure how to confirm if there are at least 2 bytes left for data blocks in order for my Nvidia card to not ignore the changes I make?

Your screenshot shows 11 bytes left. If after fixing the extension blocks the range still won't change, try adding a FreeSync data block in the CTA-861 extension block. That's only 9 bytes, so that should leave 2 bytes left.

[ToastyX]

(11-28-2021 04:28 AM)Phayte Wrote:  I am adding (1650x1080 & 165hz) as a detailed resolution then moving it above the default resolution (1920x1080 & 143.854hz) and deleting all of the Extension Blocks. If it is a driver bug where can I update or resolve the problem. I don't know if this is a problem but I'm using the Display Port, because I thought it was a HDMI issue but it isn't.

I'm still not clear about what's happening. Is the computer crashing, or is the computer working but the monitor turns black? I thought you said you got a blue screen at first, but now I realize you meant the recovery options screen, which is normal if you turn off the computer twice in a row. If the monitor is going black, then it might not support the resolution correctly with G-SYNC, so it might be going black after the refresh rate changes. If that's the case, you should still be able to use 1680x1050 @ 165 Hz with GPU scaling by adding 1920x1080 @ 165 Hz instead since 1680x1050 is one of the scaled resolutions automatically added by the driver by default. If the computer is crashing on boot, then that would be an NVIDIA driver bug that you would have to report to NVIDIA, but that doesn't sound like a driver crash because it doesn't happen immediately.