Only PCIe-16 can be SLi? - Techist - Tech Forum

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Old 08-11-2005, 11:38 PM   #1 (permalink)
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Default Only PCIe-16 can be SLi?

Just wanting clarification, but are only PCIe-16 video cards capable of SLi?

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Old 08-12-2005, 12:12 AM   #2 (permalink)
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AGP architecture has no method of cutting the work load in half. They probably could make it but I doubt they will since manufacturers want consumers to buy the latest and greatest tech out so they get more money. PCIe 16x is split into two 8x channels (not 100% sure but fairly confident it is) to split the load. Eventually when the full 16x is used SLI will be useless...

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Old 08-12-2005, 06:42 AM   #3 (permalink)
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Yes, in SLI mode the strobe multipliers are set to 8x on current SLI architecture. I beleive Crossfire works on dual 16x, not 100% though.

I have heard of dual AGP boards out there before, but they were few and far between and never seen in a desktop system.

SLI will only work with 2 identical SLI ready nVidia-based cards. Same model, same manufacturer. Crossfire allows for two non-identical cards to be utilised; an X800 XT, and the upcoming R520 series will/should work together.
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