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SLI Display limits

post #1 of 12
Thread Starter 
I've got a friend who is building a new system next month. She really wanted to give nvidia a try as she always buys ati cards, but a problem has arisen. She has three seperate displays that she wants to run at different resolutions.

As far as we can work out, a single nvidia card only supports two displays. Now my question is, will SLI support her three displays at different resolutions? We know this will be possible on ATI.

FYI, she doesn't want to run eyefinity/nvidia surround, it's three seperate displays at different resolutions, each used for different tasks. Just thought I'd get that out of the way xD
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post #2 of 12
it will only support up to 2 different displays at different resolutions. only way to get more is take them out of SLI or have them in surrond
     
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post #3 of 12
if want to run sli and have more than 2 displays not in surround. get a cheap card i.e. 8400gs to run the extra monitors. obviously only if theres a 3rd pcie slot
     
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post #4 of 12
Thread Starter 
So that would be two cards running seperately? Is it possible to have them both running at fullspeed? I'm not entirely sure where motherboards are at now with having two full speed PCI-E sockets.
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post #5 of 12
yeah, if you want to have more than 2, you need to un SLI the cards at which point you can have up to 4 at different resolutions. when in SLI they are limited to 2 at different res. only in surround can you have more. there are a fews boards that have full x16 pcie lanes. if you wanted SLI and to run more than 2 displays at different resolutions, you would need a 3rd card to handle the other displays as it will not be running in SLI. the speed of the 3rd pcie lane wouldnt really matter too much
     
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post #6 of 12
If by full speed you mean 16x, it will depend on the motherboard. For gaming purposes, you want the PCI-E slots to have 8x-16x, but if it's just a monitor for non-gaming purposes, PCI-E slots that only support 4x will do just fine.
    
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post #7 of 12
Thread Starter 
So just so I have it straight as you mentioned it twice now - is it possible to run 3 monitors at different resolutions using SLI and Surround?
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post #8 of 12
no, its not possible. to run 3 monitors in SLI, they must all be the same res and run in surround. to run 3 monitors all different resolutions, when you have 2 cards in SLI, you need a 3rd card that is not running in SLI to handle the extra monitor. the limit of non surround monitors on SLI cards is 2 monitors in total, not 2 per card.

edit : sorry for the bad wording originally.
Edited by Sircles - 6/8/11 at 4:43am
     
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post #9 of 12
Thread Starter 
No no, sorry for my lack of knowledge xD Thanks for all the info though. I have one last question then, and this is probably asking for trouble - is it possible to have nvidia and ati cards running seperately in the same system?
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post #10 of 12
yes. it depends what for, if you want the nvidia card to run physx, thats easy enough. but the other way round with nvidia as the primary card, im not sure if it would work. may i ask why....??
     
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