How big can be the resolution for PC-Mac Stand Alone?

Hi

I would like to create a game for a big resolution screen set, of about 8000 x 8000, to do this I will be using a lot of physical screens connected to a multi head graphic card.

I made my tests of building an object in unity with 8000 x 8000 in browser player and apparently this is possible, but when building to standalone, the resolution selector doesn't show the resolution I want.

Is this because my graphic card doesn't support such resolution?

Will I be able to see a 8000 x 8000 resolution option when I will add a proper graphic card?

Thank you!