Need help with add res via CRU

Hi Community,

Need help with software as I cant get added resolution to on of my 3 monitors.

My config:
GPU
2 x 1080Ti - want to do SPAN-SLi

Monitors:
1 x 34inc ACER ED347CKR (default res 3440x1400 100Hz)
2 x 27inc AOC Q27G2G4 (defaul res 2560x1440 144Hz)

I'm trying to do span with res 7680x1440 60 or 100 Hz (doesn't matter refresh rate)

When I do from NVidia control panel, max res I got for 3 monitors 5760x1080 60Hz

[Image: http://xpulse.us/fifa/100218.jpg]
and of course I can't edit res, but ACER can handle 2560x1440 100 Hz if I manually selected this res on single monitor config.

In CRU I tried to create a custom res for SPAN monitor and I'm not able to save new big res: 7680x1440 60 or 100 Hz, OK button is greyed out.
[Image: http://xpulse.us/fifa/100630.jpg]

Could someone point me to a right direction on how to add bigger res or it is not possible to do with my monitors config?

Here is a monitors CRU configuration (default)
ACER:
[Image: http://xpulse.us/fifa/100808.jpg]

AOC (2 identical)
[Image: http://xpulse.us/fifa/100917.jpg]

All monitors are connected via DisplayPorts

Thanks,
Stas

P.S. Apologize but for some reason images are showing as links...