(07-22-2025 07:51 AM)SnakeJazz Wrote: [ -> ]Greetings, I am getting into Sim Racing and wanna use triple screens. I have a Samsung Odyssey G5A 27“, 1440p, 165hz and 2x Lenovo G27-37, 27“, 1080p, 165hz. Nvidia Surround makes a 5760x1080 but limits me to 60hz. If I create a surround with only the two Lenovos they can do 165hz. When I add the Samsung the hz is being reduced. All monitors are via Display Ports connected on a RTX 3060ti directly. Can this be fixed with CRU?
Yes, it's possible. NVIDIA Surround requires all monitors to support the same resolution and refresh rate with the same exact timing parameters, so you would need to edit the detailed resolution for 1920x1080 @ 165 Hz on the Samsung to match the Lenovo monitors.
(07-21-2025 04:51 PM)johnkepler1245 Wrote: [ -> ]Hello guys, i have problem with center and surround on my 5.1, i tried everything to setup htpc with avr but its imposible. https://i.imgur.com/vDsRwif.jpeg https://i.imgur.com/8QmlUX4.jpeg https://imgur.com/a/Qk9wvnJ on photos as you can see i connected everything right, and i did all cru steps edid etc. but when i test speakers its stereo, i hear only front left and right no center no surround, decoder is good and i dont see problem becasue stereo works on every speaker but when i want 5.1 its not working. I know maybe its mixing speakers from montior but i tried everythinng with cru and edid and all of this.
I can't make sense of your post. I just see a mess of wires, so I don't know what's connected to what, and saying you tried everything with CRU and EDID doesn't tell me what you did. Is the computer connected to the decoder using HDMI in, and the decoder to the monitor using HDMI out, and the decoder to the AVR using RCA cables? What audio formats are defined in CRU?
Are you using a resolution with enough horizontal blanking? HDMI audio is transmitted during the horizontal blanking periods, so if there is not enough blanking, there won't be enough bandwidth for 5.1 surround. Check if 5.1 works with 1920x1080 @ 60 Hz. Usually 1920x1080 @ 60 Hz will have enough horizontal blanking, but if you're using 165 Hz, that often has reduced blanking, which might not be enough. If 60 Hz works, then you can try editing the detailed resolution for 1920x1080 @ 165 Hz to use "Native HDTV" timing, which should give enough horizontal blanking. If the monitor won't accept that, then you'll have to try 120 or 144 Hz instead.
(07-22-2025 02:49 PM)ToastyX Wrote: [ -> ] (07-21-2025 04:51 PM)johnkepler1245 Wrote: [ -> ]Hello guys, i have problem with center and surround on my 5.1, i tried everything to setup htpc with avr but its imposible. https://i.imgur.com/vDsRwif.jpeg https://i.imgur.com/8QmlUX4.jpeg https://imgur.com/a/Qk9wvnJ on photos as you can see i connected everything right, and i did all cru steps edid etc. but when i test speakers its stereo, i hear only front left and right no center no surround, decoder is good and i dont see problem becasue stereo works on every speaker but when i want 5.1 its not working. I know maybe its mixing speakers from montior but i tried everythinng with cru and edid and all of this.
I can't make sense of your post. I just see a mess of wires, so I don't know what's connected to what, and saying you tried everything with CRU and EDID doesn't tell me what you did. Is the computer connected to the decoder using HDMI in, and the decoder to the monitor using HDMI out, and the decoder to the AVR using RCA cables? What audio formats are defined in CRU?
Are you using a resolution with enough horizontal blanking? HDMI audio is transmitted during the horizontal blanking periods, so if there is not enough blanking, there won't be enough bandwidth for 5.1 surround. Check if 5.1 works with 1920x1080 @ 60 Hz. Usually 1920x1080 @ 60 Hz will have enough horizontal blanking, but if you're using 165 Hz, that often has reduced blanking, which might not be enough. If 60 Hz works, then you can try editing the detailed resolution for 1920x1080 @ 165 Hz to use "Native HDTV" timing, which should give enough horizontal blanking. If the monitor won't accept that, then you'll have to try 120 or 144 Hz instead.
I followed all steps on reddit htpc, that means edid/monitor info something like that, and cru ofc and resolutions ofc. Everything is connected everything is normal every input. Maybe i will buy newer avr beacause i dont have nerves to setup this. If you willing to call me on video call or direct input with messages i will give you my phone and text me im from europe, if you are very good in these things you can try solve with team.viewer
(07-22-2025 02:49 PM)ToastyX Wrote: [ -> ] (07-22-2025 07:51 AM)SnakeJazz Wrote: [ -> ]Greetings, I am getting into Sim Racing and wanna use triple screens. I have a Samsung Odyssey G5A 27“, 1440p, 165hz and 2x Lenovo G27-37, 27“, 1080p, 165hz. Nvidia Surround makes a 5760x1080 but limits me to 60hz. If I create a surround with only the two Lenovos they can do 165hz. When I add the Samsung the hz is being reduced. All monitors are via Display Ports connected on a RTX 3060ti directly. Can this be fixed with CRU?
Yes, it's possible. NVIDIA Surround requires all monitors to support the same resolution and refresh rate with the same exact timing parameters, so you would need to edit the detailed resolution for 1920x1080 @ 165 Hz on the Samsung to match the Lenovo monitors.
Hi ToastyX,
After lots of trial and error, I was finally able to get NVIDIA Surround running at 5760×1080 @ 120 Hz across my triple monitor setup (Samsung Odyssey G5A 1440p + 2x Lenovo G27-37 1080p), and I wanted to share what actually solved it:
Instead of using Detailed Resolutions, Manual Timings, or custom PC Resolutions — which caused either black screens or resulted in Surround defaulting to 60 Hz, I edited only the TV Resolutions block via CRU.
Specifically, I:
1. Deleted any conflicting or redundant TV Resolutions
2. Ensured that all three monitors reported exactly 1920×1080 (16:9) @ 120 Hz in the TV Resolutions block
After doing this, NVIDIA Surround instantly offered me 5760×1080 @ 120 Hz, and all monitors came up correctly with no flickering, blank screens, or timing mismatches. Each monitor’s on-screen display also confirmed it was running at 120 Hz.
I suspect this worked because TV Resolutions provide a more standardized EDID structure that NVIDIA can match across different panels. Matching PC resolutions didn’t work for me, likely due to hidden timing discrepancies and me knowing too little about this stuff.
I’ve now run multiple benchmarks in Assetto Corsa, including full races and hotlaps, and the framerate is stable across all three screens. No flickering, no tearing, no sync issues. The in-game FPS counter and OSD both confirm a 120 Hz output, and each monitor’s built-in menu also reports 120 Hz active.
Thanks for your excellent tool, without CRU, this would’ve been impossible.
Best regards,
Billy
(07-22-2025 06:04 PM)SnakeJazz Wrote: [ -> ] (07-22-2025 02:49 PM)ToastyX Wrote: [ -> ] (07-22-2025 07:51 AM)SnakeJazz Wrote: [ -> ]Greetings, I am getting into Sim Racing and wanna use triple screens. I have a Samsung Odyssey G5A 27“, 1440p, 165hz and 2x Lenovo G27-37, 27“, 1080p, 165hz. Nvidia Surround makes a 5760x1080 but limits me to 60hz. If I create a surround with only the two Lenovos they can do 165hz. When I add the Samsung the hz is being reduced. All monitors are via Display Ports connected on a RTX 3060ti directly. Can this be fixed with CRU?
Yes, it's possible. NVIDIA Surround requires all monitors to support the same resolution and refresh rate with the same exact timing parameters, so you would need to edit the detailed resolution for 1920x1080 @ 165 Hz on the Samsung to match the Lenovo monitors.
Hi ToastyX,
After lots of trial and error, I was finally able to get NVIDIA Surround running at 5760×1080 @ 120 Hz across my triple monitor setup (Samsung Odyssey G5A 1440p + 2x Lenovo G27-37 1080p), and I wanted to share what actually solved it:
Instead of using Detailed Resolutions, Manual Timings, or custom PC Resolutions — which caused either black screens or resulted in Surround defaulting to 60 Hz, I edited only the TV Resolutions block via CRU.
Specifically, I:
1. Deleted any conflicting or redundant TV Resolutions
2. Ensured that all three monitors reported exactly 1920×1080 (16:9) @ 120 Hz in the TV Resolutions block
After doing this, NVIDIA Surround instantly offered me 5760×1080 @ 120 Hz, and all monitors came up correctly with no flickering, blank screens, or timing mismatches. Each monitor’s on-screen display also confirmed it was running at 120 Hz.
I suspect this worked because TV Resolutions provide a more standardized EDID structure that NVIDIA can match across different panels. Matching PC resolutions didn’t work for me, likely due to hidden timing discrepancies and me knowing too little about this stuff.
I’ve now run multiple benchmarks in Assetto Corsa, including full races and hotlaps, and the framerate is stable across all three screens. No flickering, no tearing, no sync issues. The in-game FPS counter and OSD both confirm a 120 Hz output, and each monitor’s built-in menu also reports 120 Hz active.
Thanks for your excellent tool, without CRU, this would’ve been impossible.
Best regards,
Billy
Hi again ToastyX,
it went well for a couple of rounds and all of a sudden the displays went off as if the Display Port was pulled and connected again. After that the picture was weird again, i checked NVIDIA Panel and it reseted back to 60hz. I had a success for about 20 minutes. That gives me hope. What would you suggest to be done at the Detailed Resolutions?
Thank you and best regards.
Hi SnakeJazz )
As variant , you can remove all resolutions in section two I about this where Standard resolutions , you can do erase there all and next for each monitor make your work resolution , and next restart system , I think , what if you this do on each monitor in your list , this can work as you want )
Hello again, I did as ToastyX suggested and focused on matching my Samsung‘s timings and display properties with the Lenovos. I deleted the Standard and TV Resolutions. And added under detailed resolutions 1080p@120hz on all monitors. Now nvidia Surround is suggesting directly a triple screen 5760x1080 @120hz. All three monitors are being recognized as 1080p native. After a whole day of benchmarking and testing in-game, I can report now a stable success.
Thanks again for everything.
With much respect to Toasty and this incredible utility, I have a question and need some help. I don't know how he finds time to answer in this forum with such incredible activity and adoption of the CRU tool.
I bought an LC Dualup monitor, which has a resolution of 2560x2880 @ 60hz natively, and intend on using this to play MAME on my arcade cabinet setup. The monitor does not have VRR of any kind advertised in its specs, however using CRU to enable the FreeSync block (47-61hz range) for use over HDMI with my AMD RX6400 card on Windows 10 appears to be working, at least partially. The FreeSync option is now enabled in my Radeon/AMD settings app, and everything is running with latest AMD drivers. I have a custom CRU Resolution set to 61hz running permanently under this setup to ensure VRR triggers correctly (a seemingly necessary step as reported some time ago).
My tests with MAME indicate that yes VRR is working perfectly with various key games I've tested, many of which are challenging refresh rates like 56hz.
PROBLEM: If I reboot my PC it seems VRR/FreeSync wont work, even though I can see the monitor is still at the 61hz setting, and AMD reports FreeSync is activated. But very clearly there is no VRR in effect as tested through MAME etc.
My only solution when this occurs seems to be to run restart64.exe at which point VRR almost always works again. However I think even this fix sometimes doesn't stick. I have a feeling it is a temp solution to a larger problem that I am not aware of - perhaps some misconfiguration on my part.
Any advice on this would be great. Having VRR enabled in my setup would be a dream come true. Thanks again for this amazing utility and all the work that went into it.
NOTE: See attached screenshots - they are not showing as 'Active' monitor because I switched cards temporarily. But I am showing the settings for AMD/HDMI port still saved in CRU...
(07-28-2025 03:59 PM)JustinTime Wrote: [ -> ]PROBLEM: If I reboot my PC it seems VRR/FreeSync wont work, even though I can see the monitor is still at the 61hz setting, and AMD reports FreeSync is activated. But very clearly there is no VRR in effect as tested through MAME etc.
My only solution when this occurs seems to be to run restart64.exe at which point VRR almost always works again. However I think even this fix sometimes doesn't stick. I have a feeling it is a temp solution to a larger problem that I am not aware of - perhaps some misconfiguration on my part.
That seems like a driver bug. Any issue that resolves after running restart64.exe would mean the driver is not doing something correctly during the boot process. AMD doesn't officially endorse enabling FreeSync using an EDID override, so they probably didn't test this situation. If this is only happening after shutting down and powering back on, try disabling fast startup:
https://www.asus.com/support/faq/1045548/
That would not affect restarts though. The only recommendation I have is to try putting the FreeSync data block in the first extension block instead of adding a new extension block. If that doesn't help, then you might need to use a programmable EDID emulator. I don't know if any of the cheap ones are writable because the Evanlak one I tried wasn't, but there are more expensive ones that are programmable. There's also the possibility of writing the EDID directly to the monitor using
EDWriter, but most monitors are write-protected unless you find a way to disable it through the service menu.
Thank you ToastyX for your detailed reply. I think I can say SUCCESS.
I deleted the added FreeSync block, and instead edited the first (original) extension block.
I have rebooted 5 times, and hibernated twice, and the VRR/FreeSync seems to be sticking fine now!
I havent tested what happens if I shut down yet - but that is hardly something I ever do in my arcade cabinet (I usually hibernate). I will report back if any new findings.
THANK YOU!!!