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Drive third monitor by second graphics card?

post #1 of 7
Thread Starter 
I'm thinking about getting 3 Crossover monitors. I have GTX 680 card. I understand that I will be able to drive two monitors from DVI outputs of the card. From reading these forms I understand that for third monitor my option is to use a DisplayPort-to-DVI active adapter. Is there another option?

Can I add another graphics card with DVI output to drive third monitor? I have a spare Quadro FX 580 - will this work?

Or maybe it would be better to splurge on second GTX 680 that I could run in SLI... Will I be able to use DVI output on second card in SLI for third monitor? With this setup I could also play games on all three monitors with decent performance...

What do you think?
post #2 of 7
You could 2 CrossOvers with DVI only and 1 CrossOver with multi input ports.
post #3 of 7
Are you trying to play in Surround? ie have all three monitors active on the same game. Then you need everything off of the GPU thats playing the game. You can't have it off another GPU unless it is in SLI with the other card that is playing the game in which case it does not matter which output port it uses. You can do what coolxal mentioned but surround resolutions with current games ie. Hitman, Farcry3 will not run smoothly unless at lowered settings.

If you just want another monitor active then you can run any GPU with the monitor attached and windows will run in multi-screen mode.
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post #4 of 7
I'm pretty sure a single graphics card can only run 2 monitors. You should be able to run another 2 if you add a 2nd card, but not if you use SLI.

This: http://www.geforce.com/hardware/technology/sli/faq

But I could be wrong: http://www.geforce.com/hardware/technology/sli/system-requirements
Using configuration tool it says 2 GTX 680s will run up to 4 monitors.
Edited by wsjackson5 - 12/12/12 at 2:30am
    
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post #5 of 7
Thread Starter 
This is what SLI configuration tool tells me:

GeForce GTX 680 2-way SLI Multi-monitor
> Maximum Resolution: 2560x1600 per display
> Maximum Displays: 4
Special Instructions:
> All displays must be connected to the same card.
> Orientation can be defined per display.

I just wonder if somebody has this kind of set up and can comment on it...
post #6 of 7
Just to clear up some misunderstanding.

All nVidia cards EXCEPT Kepler (6xx series) can only run two monitors off of one card. You need SLI for surround gaming or another card for multi-monitor mode with three or more monitors IF you had anything other than Kepler. With a single 680 you CAN run surround and three independant monitors (possibly four iirc) but running surround in recent games on a single 680 will not get you decent frames at the higher settings.

With SLI and surround gaming the monitors do NOT need to all be on the same card, you can put the first two on the primary card and the third on the secondary or put the middle monitor on the primary and the side two on the secondary card. Unlike eyefinity where iirc you need them all on the same card you can mix and match in SLI surround.
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post #7 of 7
Correct me if I'm wrong but I think you also need dual-link DVI to run at maximum resolution. I think most 600 series have 1 single link and 1 dual link port, correct?
A displayport to DVI adapter will work and I think an HDMI to DVI will also work, but the HDMI port has to support the full resolution. And you need dual-link converters for both.
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