Third monitor doesn't work

[julian1barbera]

Hi, I have three monitors and a gt610, two monitors are 1024 x 768 the other is 1200x1920. but my third monitor, one of the two doesn't work, computer side not the monitor itself. in display settings it detects it but its a darker grey, any fix? picture of the display prefences https://imgur.com/LDrz1f6

 

[Glenwing]

The GT 610 is a Fermi-based card. Fermi GPUs only support up to 2 monitors.