Yesterday I bought a new monitor to replace an old one, I had 1 4k display and 3 1080p displays, I replaced one of the 1080p displays with a 4k one and now only 3 of them work at a time, when I go into nvidia control panel and try checking the box for the 4th one it turns off another to do so, all of the displays refresh rate are set to 60 and I have no idea why it wont let me use them all, please help!
in short, 2 4k 60 displays and 2 1080p 60 displays where only 3 work at a time