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"SLI" Question

Z

zandor

Supreme [H]ardness
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This isn't so much an SLI question, but rather a "mobo with 2 PCIe video card slots & 2 PCIe video cards" question. I used to have a Matrox Parhelia with this neat surround gaming feature. I'm wondering if something similar is possible on an SLI setup.
I saw a review of an AGP + PCIe setup where they ran some game in a window across 2 screens, and supposedly it ran "OK". I'm wondering what happens if you do that on an "SLI" setup with three. Anyone tried this? Anyone have the hardware to try it & feel like giving it a go? Can an SLI setup run "merged" mode on 3-4 screens?
 
I am pretty sure you are limited to two monitors once you enable SLI, but if you turn SLI off then you can use all four outputs on your cards. nVidia may change this in the future but that is just wishful thinking. You could install a PCI graphics card to run additional monitors if you wanted but obviously they won't help for surround gaming. This brings up an interesting thought, however. When nVidia originally announced SLI they indicated that you could put even more than two in parallel, just split up the load among each one added. If they were to get that to work and have 3+ PCIe slots on a mb then you could have even more monitors (granted once again you do not enable SLI). Of course then you would also never have to run your heater again as all you would have to do is turn your computer on.
 
I think I read somewhere that if you don't run them in SLI you can have upto 4 monitors. So say you have 4 monitors hooked up use vertical span to join the 4 monitors instead of extended desktop it'll look like one huge screen to the app/game. Now I'm not sure if each card is responsible for it's own monitors in d3d, but if it was, you'd get the same thing basically I guess, no? so card1 would render monitors 1/2 and card2 would do monitors 3/4? I'll have to check this out when I get my dual ultra's. Oddly enough, I hope it doesn't work because that will stop me from having to purchase 3 more 2005fpw's.
 
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