12 displays with two cards?

[Deeelite]

Hi guys,

i think i made a huge mistake : / We put two HD7870 (each has 6 mini Displayports) together with Crossfire, the idea was to show a video over 12 displays. For testing, i connected one display to card number one and connected another display two the second card. The display connected to the second card did not even show up in Windows. So i did a little research and read that you can only connect displays to the first card, the second is just for performance. Can you guys confirm this?

I'm not using one of these active displayport adapters, could using one of those fix the problem?

If not, how could this be realized (one PC connected to 12 displays showing a video)? There has to be some way, i've seen bigger video walls.

Thanks in advance.

[suiken_2mieu]

Turn off crossfire. That will allow you to enable all 12 outputs.
For all 12 displays to function, you will need to connect all of them via DP.

If the displays you have are DVI, use active DP to DVI adapters.

[Haldi]

Turning off Crossfire will deactivate Eyefinity aka Single Large Surface, so you can't just maximize the video anymore.
But VLC (iirc) and other players can extend and simulate a full screen over 6 Monitors.

[suiken_2mieu]

Turning off Crossfire will deactivate Eyefinity aka Single Large Surface, so you can't just maximize the video anymore.
But VLC (iirc) and other players can extend and simulate a full screen over 6 Monitors.

If you're using a video player than uses DX, you can use softTH to use SLS.

[Delphium]

[quote="Haldi"]Turning off Crossfire will deactivate Eyefinity aka Single Large Surface/quote]
Huh? disabling crossfire also disables eyefinity?
I never found this to be the case when I was running 2x 5870E6 cards, I could run eyefinity on 1 card while the other was used for independent monitors, disabling crossfire did not disable the eyefinty features.

As suiken_2mieu points out, disable crossfire, this will allow you to output to 12 displays.

If you wish to use Eyefinity with 12 monitors then take a look at the Zotec Dual HDMI adaptors...
http://www.wsgf.org/gallery/zotac-dp-du ... ent-243295

These take DP in and spit a dual HDMI out , thus turning 6xDP outputs into 12xHDMI outputs, all with eyefinity support, the PC would detct 6 monitors, but each monitor would count for a pair of monitors.

[Haldi]

Huh? disabling crossfire also disables eyefinity?
I never found this to be the case when I was running 2x 5870E6 cards, I could run eyefinity on 1 card while the other was used for independent monitors, disabling crossfire did not disable the eyefinty features.

.

It disables the existing Setup, not the functionality itself. That's what I meant.
IIRC you can't use Eyefinity over 2 different cards, they all need to be plugged in one card. Or am I wrong here?

[Delphium]

IIRC you can't use Eyefinity over 2 different cards, they all need to be plugged in one card. Or am I wrong here?

Correct, Eyefinity will not span over multiple cards a eyefinity group must be performed from 1 card, with additional cards adding rendering horsepower, but not additional monitors for the eyefinity group which is in it self limited to 6 monitors.

As I stated above, if one wishes to use Eyefinity with 12 monitors, then one will need to use a bit of hardware to split the image, devices like the zotec dual HDMI out, or the Matrox Dual/Triple head to go units, also mview and datapath provide such devices.