So, this is the second time this has happened to my system in my sig. I was originally using 3x Display Port and one day my smaller 1080p monitor stopped being recognized by Windows. I messed around and swapped to an HDMI cable for my 4K monitor (since it's only 60Hz) and everything started working again. Now, months later, the 1080p stopped working again and is no longer recognized by Windows. I'm downloading the latest Nvidia driver right now, but does anyone know why this is happening?