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Billb1313

unexpected SLI performance after adding card

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XeonW1xGTX580.thumb.png.b137ce712dc68562ce70a0ce1b96e30e.png

abovXeonW2xGTX580.thumb.png.e20e98dd74236bac21ea79f65f23d8e0.pnge is system with 1 gpu

top pic is with one gpu, second is with 2.  I expected much more performance increase.  When I first ran I did not configure the nb3d.exe and got ZERO change but as shown above, second card seems to have done REMARKABLY little to bump performance.  I didn't expect a doubling but I did expect at least 40-50% better results.  Any thoughts (mobo is gigabyte mb99x-gaiming 5p

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SLI performance is complicated. As you mention, doubling performance is basically never going to happen. Speed-up can vary a lot between card models and configurations.

Can you enable "SLI visual indicators" - as shown below - as a quick check that it's working at all? Just let me know how much of the green SLI bar fills during the test.

sli3.jpg

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