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What adds up in SLI?

post #1 of 19
Thread Starter 
Couldn't find any threads that could answer this officially, and google.ca came up with nothing. But what is doubled when you SLI? Fill rate? Core speed? mem bandwidth? what shaders? sorry if the info is right under my nose. Thanks!
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post #2 of 19
start here:

http://www.overclock.net/nvidia/2110...ead-first.html
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post #3 of 19
Thread Starter 
i read it long ago it has no technical info
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post #4 of 19
Thread Starter 
but thanks
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post #5 of 19
np! Nothing really "adds" up in SLI, the two GPU's are working together in parallel to provide more performance. How they scale depends on the driver, settings, and the software you are running. Some games benefit more from SLI than others.
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post #6 of 19
Thread Starter 
I see, so it's onlly the GPUs that work together and nthoing else whatsoever?
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post #7 of 19
They work together.. thats about it.

Imagine it as Raid 0, but you don't get double the space. Since 2x 768MB cards in SLI is still 768MB.

Everything is basically shared between the two cards, and they work together. Dependings on the rendering mode as well. One mode will have one card take half the screen and the other take the other half, other modes will make 1 card take 1 frame, then the other take the next, and back and forth.
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post #8 of 19
One renders half of the frame, the other renders the other half. That's one way you can configure SLI.

There is no "adding" unless you're adding how many Gflops they produce.
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post #9 of 19
Quote:
Originally Posted by Murlocke View Post
They work together.. thats about it.

Imagine it as Raid 0, but you don't get double the space. Since 2x 768MB cards in SLI is still 768MB.

Everything is basically shared between the two cards, and they work together. Dependings on the rendering mode as well. One mode will have one card take half the screen and the other take the other half, other modes will make 1 card take 1 frame, then the other take the next, and back and forth.
Even though I already knew that, +1 for a great description and example.
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post #10 of 19
Thread Starter 
i fully understand now, thanks all!
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