3 monitor set up - only 2 working

[JamesHongKong]

Hi

I have 3 Dell U2312HM monitors and recently upgraded my graphics card to a GTX 780Ti. Before I had a Radeon 7870 and connected one monitor by DVI and the other 2 by display port to mini display port going into the card.

Now I have 2 connected by DVI and the 3rd by normal display port cable. The 3rd monitor however is not displaying anything. It seems stuck asleep. When I press the power button on the screen to try and wake it up windows recognises it as connecting/disconnecting as per a USB input being added/removed - it makes the USB connect/disconnect sound. I have selected display port as the connection type on this screen but still no joy - it remains asleep.

All 3 displays are recognised in Windows.

Anyone have any ideas?

Thanks

James

 

[jay337]

did you try to swap cable between the second that is working and the third one that is not working ?

 

[JamesHongKong]

did you try to swap cable between the second that is working and the third one that is not working ?

Yes I've done that. The monitor is fine and Windows 7 can see all 3 monitors but only the 2 connected via DVI are showing anything on the screens. I am going to test another cable later too to see if this is the issue.