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Disable SLI on the 4th Card

post #1 of 15
Thread Starter 
Suppose that I have 4 SLI cards connected. Then I decide to disable the last card temporarily and use Tri-SLI instead.

Is there a way for me to do that quickly? Will taking out the SLI cable on the 4th card do the trick? Or is there any setting in nVidia control panel or perhaps BIOS setting that I can use for this purpose?
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post #2 of 15
Why do you want to take it out of SLI? Or more specifically why do you want to go from 4 way to 3 way SLI?

You can SLI without a cable, so I don't know if removing the cable will be enough to take the system out of SLI.
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post #3 of 15
I have no experience with more than 2way SLI, but for me its either on or off, I would assume its the same for you. If thats the case the only way to go from 4-way to 3-way would probably be to remove the 4th card from the board.

Edit: Right after I posted that I remembered people using 3-way with a 4th as a dedicated physx card, I'm not sure if they took it out of sli for that or not , but I'm sure someone with more experience will help soon enough.
    
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post #4 of 15
Quote:
Originally Posted by amang View Post
Suppose that I have 4 SLI cards connected. Then I decide to disable the last card temporarily and use Tri-SLI instead.

Is there a way for me to do that quickly? Will taking out the SLI cable on the 4th card do the trick? Or is there any setting in nVidia control panel or perhaps BIOS setting that I can use for this purpose?
Set last card to strictly PhysX use.
    
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post #5 of 15
impossible. when u have 4 identical cards installed, you cannot choose anything else but 4 way SLI. unplug the 4th card and plug in a different card.
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post #6 of 15
Thread Starter 
Quote:
Originally Posted by MR KROGOTH View Post
Set last card to strictly PhysX use.
Do you need a special driver to do that? Or can it be done via nVidia control panel?

Quote:
Originally Posted by james8 View Post
impossible. when u have 4 identical cards installed, you cannot choose anything else but 4 way SLI. unplug the 4th card and plug in a different card.
Problem is I need the 4th card to stay in its PCI slot. Is it possible to only remove the SLI connection? Or perhaps remove the 6/8 pin power connectors as well?
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post #7 of 15
ok first of all do you have four IDENTICAL cards installed? (for example 4 GTX 480s) if that's the case, then there is not much u can do beside installing another card like i said.
if u have 3 identical cards and 1 different cards installed, then you're set
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post #8 of 15
Thread Starter 
Ok thanks for the info.
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post #9 of 15
Quote:
Originally Posted by MR KROGOTH View Post
Set last card to strictly PhysX use.
This should work
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post #10 of 15
I also would think you could choose to dedicate any of your 4 cards to PhysX use, thus taking it out of the SLI set.

Jam3s I'm pretty sure that as of the 260-series drivers there's no longer the issue you've been referring to when the cards are identical. The 260's introduced the control panel that allows you to choose to dedicate a specific card to physX, which automatically takes that card out of the SLI set even if it's identical to the others.
    
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