Custom Resolution Utility (CRU)

[SnakeJazz]

(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