Custom Resolution Utility (CRU)

[WeiSeongHoon]

I have a Samsung NEO G8 4k Monitor and two Samsung OLED G8 (3440x1440).
I'm currently trying to enable nvidia surround for them and whenever I try that, it only gives me the resolution of 7680x1440. To me this doesn't make sense because if I added all the horizontals together it should be above 10000 resolution right? and keeping the 1440 as a vertical. I don't know much about monitors and I'm trying to get this to work. I tried adding resolutions using CRU and every time I do it, my monitors flicker and I basically have to reinstall my graphics drivers to get them back to normal. Any advice would help thanks.

CPU: I9-13900k
GPU: Nvidia RTX 4090
All monitors using Display port