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I recently updated to Win 8.1 - now only 2 of my 3 monitors are working, after they were all working perfectly fine under Win 8.

I have 3 x HP E231's running on an AMD R9 280x - One of the monitors is DVI, the other two are Mini-Display Port to DVI.

In Screen Resolution or the Catalyst Control Center, every time I try to enable the third monitor it tells me I have to disable another one.. I can't find much info on the net about this problem - have checked here Windows 8.1 triple monitors - can't enable all 3 at the same time but the guy just brought an adapter - I know all three monitors were working under Win8 so why not 8.1?

Cheers

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Jono Rogers
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  • I suspect the driver has been updated... Are you using the AMD drivers or the W8 drivers? – Dave Nov 20 '13 at 10:53
  • Are you running the current drive release? The driver display model changed significantly in order to support Direct X 11.1. I have found that in most cases Windows 8 drivers in general DO NOT WORK on Windows 8.1. – Ramhound Nov 20 '13 at 12:38
  • I ended up just rolling back to vanilla windows 8 after getting heaps frustrated with it, so I'm sorry, I can't make this as answered.. if anyone else has been in the same boat, chip in with your comments. As it is, I can't be bothered upgrading to 8.1 again, even though AMD has now brought out a later set of drivers. Their support is just too terrible to bother. – Jono Rogers Apr 07 '14 at 05:23

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I added more 1 solution, which is:

Also works without mini Display Port, just unplug your GPU from Motherboard for some time and then re-plug it and all monitors.

Windows 8.1 triple monitors - can't enable all 3 at the same time

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Jeckerson
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