I have the Q9550 quad core which is overclocked to 3.1 with 6 gig ram.  I have everything  maxed out with 1920 X 1080 resolution. I'm still hitting as low as 35 fps.

I checked and the multi gpu is set to 1 in config_MP file. But I have a multi core cpu and this line I had to change to the "1"  ( seta r_multithreaded_device “0” which is fo non multi core cpu ).  It didn't make any difference though. I even change the multi gpu to "0" just to see the difference and there wasn't much. It makes me wonder if thee isn't something wrong with one of my video cards.
   I think the card in slot 1  is okay since it's the main card that the computer uses. Then the card in slot 2 works through the card in slot 1.  At least I think that's how it works. I guess I'll have to take out the card in slot 1 and put the other card in there, then try it by itself in black ops to see if I'm still getting the 35-95 fps range. While I've been using the geforce GTX 460 cards in sli mode I don't think I saw the fps go over 100 once.
   I did a search in the player mp-config file for framebuffersize line, there is x and y and the search didn't find it.
   If you guys have any more suggestions on what to try I'd appreciate it. I just sucks to spend this much on the 2 cards and not get what I expect out of them.

I'm using an evga motherboard with the intel quad core Q9550 which runs at 2.83ghz which I have it overclocked to 3.06ghz stable. I also have 6 gigs of ram (ddr2 Kingston HyperX PC8500 aka 1066)  running windows 7 (64bit OS). My hard drive is Western Digital VelociRaptor  150GB 10000 rpm. And of course my video cards are two ASUS ENGTX460 oc cards in sli and enabled in nvidia control panel. I even checked to make sure both the cards show up in mp config ( seta r_multiGpu “1”) and the cpu (seta r_multithreaded_device “1”). Yet today while playing on Black Ops my fps was as low as 34 and only as high as 91 and that's turning off "shader warming" and setting anti-aliasing to 8X, plus turning down anisotropic filtering alittle. I had the resolution set to 1920 X1080 and everything else maxed out. I should be getting more outa 2 460 cards in sli shouldn't I???

My PSU is a 1000 watt beast byKingwin.  So I should have this setup (seta r_multithreaded_device “0”). Well, I just tried other card alone and the fps in black ops was as low as 30 up to 91. I was hoping that maybe the card in slot 2 had something wrong with it and that was causing the problem, but the single card worked just fine. Could there be something wrong with the bridge that, even though, it allowed the sli to be enabled but didnt' work otherwise?