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triple monitor setup problem

Last response: in Graphics & Displays
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May 27, 2013 7:27:41 AM

Hi everyone,

Here is my situation:
3 x crossover 2720MDP ( 27 inch, displayprot, HDMI, VGA and DVI)
Single GIGABYTE 7970 GHz edition (2 x mini displayport, 1 x HDMI and 1 x DVI)
1 x HDMI cable
3 x Dual link DVI cable
2 x displayport male to male cable
1 x dispalyport to mini displayport adapter ( comes with the graphic card)

I've spend the past 3 hours trying to setup the thing and I can only make 2 of them working in eyefinity.(displayport and DVI, resolution of 3840 x 1200)
When I plug the 3rd monitor in HDMI port, Windows recognizes it but Catalyst control panel doesn't.

So my question is:

Do I need another mini displayport - displayport adapter or I didn't setup the HDMI monitor properly?

Thanks in advance,
Lin
a b C Monitor
May 27, 2013 7:44:28 AM

"Active" display port adaptor?
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Best solution

May 27, 2013 7:46:07 AM

You talk about plugging the 3rd monitor. Is an eyefinity group created at this stage? Best test by detroying any eyefinity groups and start all over (you cannot "add" a new monitor to an existing group).
Also, I don't know but dual-link can be an issue. I see on wikipedia that dual-link is used for 1920x1200 with more than 60Hz, so if eyefinity tries 60+ refresh, that would also affect it. Why? because these GPUs have only 2 clock generators for monitor signals and 1x dual-link DVI would use them both.
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a b C Monitor
May 27, 2013 7:48:40 AM

So you have one mini DPI to DPI to one monitor, one DVI to another monitor and you're trying one HDMI to the third?

Try using the other DVI port if you haven't yet. Does that work?
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May 27, 2013 7:49:34 AM

ur6beersaway said:
"Active" display port adaptor?

Are you asking or sugesting?
asking: no he has not DP to non-DP adapters, so not "active" discussion.
sugesting: expensive, and a better solution would be for a DP-to-miniDP.
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a b C Monitor
May 27, 2013 7:56:11 AM

mathew7 said:
ur6beersaway said:
"Active" display port adaptor?

Are you asking or sugesting?
asking: no he has not DP to non-DP adapters, so not "active" discussion.
sugesting: expensive, and a better solution would be for a DP-to-miniDP.


Corrected thanks
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a b C Monitor
May 27, 2013 8:03:35 AM

hook up 2 to display port and the third to dual link DVI. This is bat shit stupid crazy simple
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May 28, 2013 2:55:16 AM

thanks for your guys reply, with 1 dual link DVI, 1 HDMI and 1 DP TO MINI DP. I'm able to setup eyefinity display group, but only at the resolution of 5760 x 1200. When I set it to 5760 x 1080, the 3rd monitor(HDMI) doesn't stretch to the edge, leaving 4 10mm wide black borader .
I guess I'll just go and buy another DP - mini DP adapter.
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May 28, 2013 2:56:01 AM

ubercake said:
So you have one mini DPI to DPI to one monitor, one DVI to another monitor and you're trying one HDMI to the third?

Try using the other DVI port if you haven't yet. Does that work?


the card has only one DVI port.
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May 28, 2013 3:52:15 AM

problem solved.

in Catalyst control center- My digital Flat-panels- Scaling options. the HDMI monitor was set 10% underscan, manually adjust it fixed the problem.
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May 28, 2013 3:54:15 AM

mathew7 said:
You talk about plugging the 3rd monitor. Is an eyefinity group created at this stage? Best test by detroying any eyefinity groups and start all over (you cannot "add" a new monitor to an existing group).
Also, I don't know but dual-link can be an issue. I see on wikipedia that dual-link is used for 1920x1200 with more than 60Hz, so if eyefinity tries 60+ refresh, that would also affect it. Why? because these GPUs have only 2 clock generators for monitor signals and 1x dual-link DVI would use them both.


Dual-link DVI cable was on of the causes of the problem too. thanks for the tips.
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July 25, 2013 3:33:27 AM

that just solved my problem .... thanks linzheng as I had the same "fit" problems with my hdmi connected monitor
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!