Custom Resolution

I am developing a custom app for an installation project which will displayed on a massive wall made of multiple screens, the screen will act as one display, the resolution is 8320x2160 which is higher than the current top card 1080Ti tops out at 7680x4320, but i know that people have run these cards to drive three 4k screens, and i am wondering if i can get some advise on the best approach to this problem?