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question on SLI

post #1 of 10
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i just picked up a second 8800GT and i had a question as im new to sli.

in the Nvidia control panel for Sli i noticed both ''enable sli'' and 'set physX GPU acceleration''

now i know if i had a mix of cards i can set one as a Physx accelerator, but if i have both sli and PhysX boxes check off, what would happen, am i in SLI or am i using one card for display and one for a physX render-er.

thanks in advance.
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post #2 of 10
If you have them both unchecked, then it will probably just use one card overall.
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post #3 of 10
If you enable SLI then you are using both cards (I have same set-up).

I also have PhysX enabled, for those games that use this feature (which are few).
 
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post #4 of 10
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Quote:
Originally Posted by joemaniaci View Post
If you have them both unchecked, then it will probably just use one card overall.
oh i meant their both checked off as in their both checked as enabled
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post #5 of 10
It would only utilize one card once SLI is disabled and the 2nd one as Physx if enabled. I have SLI + a physics card so I have been playing around with it for a while now.
post #6 of 10
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alright so if i want two cards running in SLI it would be smart to disable the PhsyX GPU setting?
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post #7 of 10
Quote:
Originally Posted by Nailuj View Post
alright so if i want two cards running in SLI it would be smart to disable the PhsyX GPU setting?
Nope it will run SLI enabled.
post #8 of 10
Thread Starter 
Quote:
Originally Posted by killerhz View Post
Nope it will run SLI enabled.
ohh okay i think i get it. so if both PhysX and SLI are enabled, it will run SLI for anything and for PhysX apps, it will run independent GPU's?
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post #9 of 10
Quote:
Originally Posted by Nailuj View Post
ohh okay i think i get it. so if both PhysX and SLI are enabled, it will run SLI for anything and for PhysX apps, it will run independent GPU's?

No.When you have both checked it will run SLI and do Physx on the cards at the same time.You allso need to set SLI configuration to alternate frame rendering 2 in the NV controle panel.
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post #10 of 10
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Quote:
Originally Posted by Sasquatch in Space View Post
No.When you have both checked it will run SLI and do Physx on the cards at the same time.You allso need to set SLI configuration to alternate frame rendering 2 in the NV controle panel.
i see i see. just one more thing. in a nutshell, what is alternate frame rendering 2 and how does it deviate from Nvidia recommended settings?
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