Alot of people are still posting about the lack of support for sli with 3dm11 so here is somewhat of a fix until Nvidia releases new drivers.  I've tried a few drivers and the only ones that I can get SLI to work on are the 263.09 (GTX 580) and the 265.90 (Quadro) drivers.  Other variations of these drivers may work too.  You MUST force AFR 2 in the NVCP in order to get SLI to work with the 263.09 drivers.  These drivers are FM approved at the moment but not half as good as the 265.90 Quadro drivers.  The 265 drivers will work with sli without doing anything in the NVCP, however, for some reason the last test (combined test) will 'chug' along and ruin your score.  The test may even crash upon getting to the end.  The trick is to still force AFR 2 in the NVCP with the 265.90 driver and then the last test will open up and fly.  To use both the 263.09 and the 265.90 drivers with 400 series cards you will need to use a modded .inf file.  To do this you must extract the driver using winrar, 7zip, etc. to a folder on your machine.  Then place the modded .inf file into the Display.Driver folder after the driver is extracted.  Just copy over or backup your old .inf file if you want.  Remember to force AFR2 in the NVCP.  Happy Benching.
 
modded .inf file that will work with both 263 and 265 driver:
nv_disp.inf
 
265.90 Quadro driver:
http://www.nvidia.com/object/quadro-win7-winvista-64bit-265.90-driver.html

d1eseL

Alot of people are still posting about the lack of support for sli with 3dm11 so here is somewhat of a fix until Nvidia releases new drivers.  I've tried a few drivers and the only ones that I can get SLI to work on are the 263.09 (GTX 580) and the 265.90 (Quadro) drivers.  Other variations of these drivers may work too.  You MUST force AFR 2 in the NVCP in order to get SLI to work with the 263.09 drivers.  These drivers are FM approved at the moment but not half as good as the 265.90 Quadro drivers.  The 265 drivers will work with sli without doing anything in the NVCP, however, for some reason the last test (combined test) will 'chug' along and ruin your score.  The test may even crash upon getting to the end.  The trick is to still force AFR 2 in the NVCP with the 265.90 driver and then the last test will open up and fly.  To use both the 263.09 and the 265.90 drivers with 400 series cards you will need to use a modded .inf file.  To do this you must extract the driver using winrar, 7zip, etc. to a folder on your machine.  Then place the modded .inf file into the Display.Driver folder after the driver is extracted.  Just copy over or backup your old .inf file if you want.  Remember to force AFR2 in the NVCP.  Happy Benching.

modded .inf file that will work with both 263 and 265 driver:
nv_disp.inf

265.90 Quadro driver:
http://www.nvidia.com/object/quadro-win7-winvista-64bit-265.90-driver.html

This didn't work for me. I'm already running the Quadro drivers.  The bench runs fine. I'm showing al three GPU's loaded. However the bench went to crap from 7K plus to less than 6K. Weird. This bench is all over the place.
 

 
 

scores for the 480's are higher than that of the 580s so far via 3dmark.com results. (due to drivers im sure)

why play with bugged and corupt software for a bench that means nothing at this point IMO. software is baddly written and cause issues. no nvidia support properly and IMO no real scores can be produced as of right now. use vanatge for that...oh forgot futuremark screwed that to...lol corupt the vantage files upon install of 3dmark 11. look for fix in 400/500 series.

d1esel, thanks for putting in the effort to figure this out.