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Radeon HD 6870 Dual Monitor Problem

Last response: in Graphics & Displays
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August 27, 2012 10:43:25 PM

Hi, guys :bounce: 

My System:
Asrock 970 Extreme4 Mainboard
Radeon HD 6870 Graphics
4GB Corsair Ram
Windows 7 64bit

Problem:
I want to use 2 LCD Monitors with my PC. Both have VGA and DVI Ports.
I alredy use one Monitor over a VGA-Adapter on the first slot of the Radeon HD.
Now i want to plug in the second Monitor with a DVI-Cable and on the DVI-Slot of the Monitor.
When i plug in the second Monitor my main Monitor goes black and the second one doesn't get any signal.

I have searched in the Control-Center of the Radeon-HD but found nothing tha seemed helpful to me.

Help would be greatly appreciated.
a b U Graphics card
a b C Monitor
August 27, 2012 10:53:36 PM

Does your 6870 card have more than one digital output (i.e. DVI, HDMI) and how many of each? If it does then just get a second digital video cable and don't even use the VGA cable. I have mine hooked up using a HDMI to DVI-D on the first monitor and a DVI-D to DVI-D on the second monitor. It works much better and completely avoids windows quirky behavior associated with the VGA output.
!