Topic Title: Need help with 3rd monitor
Topic Summary: Sapphire HD7850 can only manage 2 monitors, not 3
Created On: 12/27/2013 11:39 AM
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 12/27/2013 11:39 AM
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Joined: 12/27/2013

2 years ago I purchased my PC with a 7850 and had all 3 monitors up and running smoothly with little issues.


My existing monitors all HP 2211x and each has a DVI and VGA connector.


SapphireHD7850 has 2 mini display ports, 1 HDMI and 1 DVI


Initially I was using 1 apple MiniDP to VGA, 1 Apple MiniDP to DVI and a straight DVI to DVI to connect all 3 monitors and all worked just fine until about a month ago when the third monitor would start blinking on and off and then wouldnt come back on until I disconnected it and swapped connections between the two MiniDP connectors.


Currently only 2 are working. I cannot get any image on a 3rd monitor. I have tried every setup imaginable. I can only get any 2 monitors to work at one time.

My motherboard is an ASUS P8Z68-V

Any thoughts or advice? Do I need to buy a new graphic card? 


Sapphire Radeon 7850

My Monitors



I have 3 DVI cables, 3 VGA Cables, 1 MiniDP to VGA adapter (active according to apple), 1 MiniDP to DVI (not active according to apple) and 1 MiniDP to DVI (Active) Accell MiniDP to DVI Active


Thank you.

 12/27/2013 05:32 PM
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 12/27/2013 06:09 PM
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Polygon Pusher

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Joined: 03/01/2009

I'd pick up another Mini DP to DVI active adapter just to make sure the adapter hasn't gone bad but I mean thats what it sounds like with the way you said it was flickering. 

What I would do is this. 

Pick up an HDMI to DVI converter. 

Then Monitor 1 , DVI to DVI

Monitor 2 , HDMI to DVI

Then For the 3rd one. Try useing th accell mini DP to DVI active adapter on either of the mini display ports. If you can't get 3 going, try another adapter. 

And try to narrow it down if its just the 1 mini display port that went bad. or your adapter. 

I do know those adapters go bad fairly easily as I've gone through 1 sapphire and 1 XFX one ever since the 5k series of cards. (then again I may be completely wrong I am simply talking from experience of how the adapters have treated me)


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