Triple eyefinity help

[dodge586]

Hi,

I've been searching around and have found lots of related info but no definative answer as to why my intended triple screen setup isn't working and what I need to do to get it working. I'd imagine that plenty of people here would have some experience in eyefinity setups!

So I have a single 7850 with 2 Minidisplay ports, 2 DVI and a HDMI output.
My main 24" screen sits in the middle @1920x1200 and either side I have 20" 1600x1200.

I have tried connecting the two edge screens via MiniDP to DVI cables and the main screen via a normal DVI cable. In this setup I can only get the two edge screens to work. the main screen on my DVI is off and can't be enable in control panel (says unable to save settings when you try to enable it).

If disconnect one of the edge screens and instead use the miniDP - DVI cable to connect the main middle monitor it works happily with the one remaining edge screen both using the miniDP-DVI cables.

What I can't seem to achieve is to have two screens on mini-DP and one on DVI simultaneously!

Any suggestions?

If all else fails would getting a second 7850 and running in crossfire work, it should double the number of ports but would software support eyefinity split over multiple gpu outputs?

Any thoughts appreciated

Thanks

 

[dodge586]

Thanks...

I didn't realise that with crossfire all the monitors still needed to be connected to the same card.

The latest generation cards and drivers do support different resolutions - indeed I am able to achieve this now - only on two screens though.

My main (largest/middle) screen has: 2X DVI, 1X HDMI, 1X Display port.

My two side screens have 1X DVI and 1X D-SUB.

To reiterate my 7850 has 2X miniDP, 2X DVI and 1X HDMI.

What is the difference between active and passive adapters? I presume that my current cables (2X miniDP to DVI, straight wired) constitute passive adapters?

 

[dodge586]

Thanks for the advice.
24" complimented by 20" monitors at the side works reasonably well as there is only about 1cm difference in the total screen heights due to the ratio between widescreen and traditional monitor sizes.

I have already achieved an extended desktop across 2 different resolutions and this works nicely. I haven't tried it in eyefinity mode though which I suppose I should do

Ideally yes, all monitors should be the same size/resoluteness but I physically don't have the room and my main screen was a huge investment (IPS for photoshop work) and I simply can't entertain the thought of replacing it!

I shall try running the main display via miniDP and the two axillary screens off DVI and report back.

thanks