All monitors go black when connecting third

[synKas]

Connecting two monitors works fine, but when I connect my third monitor (any of them, doesnt matter wich one) all of them go black. It does not say "no signal" they just stay black, and pressing the power button doesnt turn of the computer. I have to force it off by holding the button. When the problem occurs it does not fix itself by plugging it out again, i have to restart the computer to fix it. What cable I use doesnt matter either.

 

The problem started for the first time today. I used all three last night, went to bed (turned off the pc) and when I turned it back on today said problem occurs every time I plug the last one in or have all plugged in at startup. If all are plugged in at startup I can see the post message and BIOS stuff, but when Windows starts its all black.

 

I have tried mixing the cables, and I have updated Catalyst drivers. Both the 290X cards work fine when only using two monitors, rolled back to stock clocks and stress tested. Not thermal throttling.

 

Windows 8.1 64 bit

Latest Catalyst drivers 14.501.1003.141120a-178000C

 

Asus Z97-A

i5 4690k

Corsair dominator platinum 1866 8GB

AMD R9 290X Matrix Platinum 4GB

AMD R9 290X Matrix Platinum 4GB

EVGA Supernova G2 1000W

 

Monitors:

BenQ GL2450 60hz (connected with DVI to card 1)

BenQ GL2450 60hz (connected with DVI to card 1)

Asus VG248QE 144hz (connected with DP to card 1)

 

Thanks in advance!

[synKas]

Update:

 

I tried playing music and force the problem by connecting third monitor. Music keeps playing for about 15 sec before "fading out  quick" like spotify does when you pause the music, not a cut like if you shut down or crash the system. Media controlls on my keyboard however dies, so I can`t controll the sound level or mute the music like I can before the bug.

[FlufflesMcBob]

Hi synKas - I'm new here, so don't expect a pro answer from me, but here's my break down of the situation:
1) You should be able to run three monitors with AMD's eyefinity BUT
2) According to this article on pcworld.com (http://www.pcworld.com/article/2055507/hands-on-with-amds-radeon-r9-290x-gpu.html), there are some limitations on eyefinity setups

3) "There are some limitations, however: All the displays must support identical timings, for instance, and you must configure the display clocks and timing when booting the PC."

What I gather from that article (with extra parts I didn't quote), you can run two monitors on different refresh rates, in your case 60Hz/60Hz or 60Hz/144Hz, but you can't have different refresh rates with 3 monitors (That's what I assume when they make reference to "identical timings".

Solution? I suggest you try figure out a way to under clock your 144Hz, as sad as I am to say this for you, and to see if your setup works with 60/60/60 refresh rate. Hope this means something!

[synKas]

Hi! Thank you so much, but this did not solve the problem. 60/60/60, same thing happens. I have had this setup for a month and I have played games at 144hz while having crome, stopify, teamspeak and such on both the two other ones with no problem. This happened overnight. 60/144/60 worked yesterday basically.

[FlufflesMcBob]

I'm afraid I don't really know what to do then if it was working fine the day before and failed today. Perhaps something recently installed on your computer, for example I am not asking you to do anything that jeopardises your GPU's functionality, but if you can find out if your system installed a new GPU driver yesterday, you may want to look out for if such a thing happened, and revert the offending driver.

[synKas]

Cant find any events like that, trying to reinstall windows now

[CatzRuleZWorld]

Maybe the drivers updated automatically and broke it? Try going back to an older version is what I would do.

[synKas]

Wow, that actually worked Thanks!!

[FlufflesMcBob]

Glad to help