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SLI GTX 780 ti & Physx GTX 750 ti - NO SLI SETTING

So.. I've been running my SLI 780s for a couple weeks now with zero issues..

Decided that I'd add the 750 for physx just because I could. Upon installing this card, I've since lost the ability to configure the 780s in SLI. Both cards are recognised. SLI bridge is in. Properly seated. Drivers uninstalled and reinstalled. Still, no SLI options.

Any ideas?

Thanks.
6 answers Last reply Best Answer
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  1. Best answer
    When you plug in your third card do your PCI-E slots go to 8x 4x 4x? I'm pretty sure NVidia disables SLI on 4x slots... https://forums.geforce.com/default/topic/736221/sli/why-limit-sli-to-not-work-on-4x-even-in-a-pcie-3-0-slot-/
  2. Traciatim said:
    When you plug in your third card do your PCI-E slots go to 8x 4x 4x? I'm pretty sure NVidia disables SLI on 4x slots... https://forums.geforce.com/default/topic/736221/sli/why-limit-sli-to-not-work-on-4x-even-in-a-pcie-3-0-slot-/


    Yeah, they do. Its just too slow.
  3. So I have a choice between SLI or dedicated physx? I'm guessing this is a motherboard limitation (ASUS Maximus VI Formula)
  4. Hello man said:
    Traciatim said:
    When you plug in your third card do your PCI-E slots go to 8x 4x 4x? I'm pretty sure NVidia disables SLI on 4x slots... https://forums.geforce.com/default/topic/736221/sli/why-limit-sli-to-not-work-on-4x-even-in-a-pcie-3-0-slot-/


    Yeah, they do. Its just too slow.


    Which is kind of stupid, since PCI-E 4x 3.0 is pretty much the exact same as PCI-E 2.0 8x, which they support... I guess common sense and companies doesn't really mesh these days.
  5. Billy213 said:
    So I have a choice between SLI or dedicated physx? I'm guessing this is a motherboard limitation (ASUS Maximus VI Formula)


    The 780 SLI pretty much negated the dedicated PHysx card.
  6. How depressing.
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