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Possible Duplicate:
3 Monitors on Sapphire Radeon HD 6870

I have an Asus Radeon 6870 with four places to connect a monitor.

enter image description here

I am using three 1920x1080 monitors, connected to the following ports:

   Card                         Monitor
   DVI    -------------------->    DVI
   HDMI   -------------------->    HDMI
Mini DP   ----> Convertor ---->    DVI

This is the convertor I use: Mini DisplayPort to DVI converter

enter image description here

My card detects all three monitors, but when I go to extend the desktop onto the third monitor, this error comes up and I cannot get all three to work at the same time.

"To extend the desktop, a desktop or display must be disabled." with "Continue" and "Cancel" as options.

I tried the left DVI, the HDMI and I have tried both Mini DPs with the adapter.

I have looked at the other thread on this site in order to solve this problem, still no working solution.

Community
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Dagarian
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1 Answers1

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Most modern graphics cards, including this one based on the error, only support 2 display outputs at a time. Even though it detects the third monitor, it will be unable to use it without disabling one of the ports in use.

There are graphics cards that support more than 2 displays out, but they are more specialized cards.

Keltari
  • 75,447