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RadeonHD 7950 Three Monitors

178 views 6 replies 3 participants last post by  cruisy18 
#1 ·
Hi there,

I have done some research but I'm having trouble finding the exact answer.

I have a RadeonHD 7950 with the following inputs:

1 x HDMI
1 x DVI
2 x Mini DisplayPort

I have 3 monitors (one of them being a Wacom Cintiq).

I have the following ports used:

1 x DVI (Main monitor)
2 x Mini DisplayPort (Wacom and Second Monitor)

I have used HDMI to Mini DisplayPort adapters for the Wacom and the second monitor.

I can get all monitors to work, however, only 2 at a time. What do I need to buy to be able to get all screens to work simultaneously?

Thank you in advance!
 
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#2 ·
One of your DisplayPort to HDMI adapters has to be an active adapter. GCN cards can only output two HDMI/DVI (TMDS) signals, meaning for 3+ displays at least one needs to be a native DisplayPort (LVDS) signal. With a passive DP to HDMI adapter you're simply passing the TMDS signal through the DP with no conversion involved. An active adapter performs the necessary conversion to pass an LVDS signal to an HDMI monitor.
 
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