Quote Originally Posted by Ñightsham View Post
Yeah, I was referring to a blue post about it.

Thanx
It pretty much falls under the same "official-ness" of multiboxing: You can use it, but if you have a problem with it, they're likely going to tell you to disable SLI in order to troubleshoot your problem. If your GPUs being in SLI are what is causing the issue, Blizzard is unlikely to 'fix' anything on their end and you'll have to take your problem to the nVidia forums.

And what the OP said in that thread is true, SLI can mess with Shadows that are set to High -- You're pretty much stuck with Good or Ultra. As for whether you'll see a performance gain or not, well... That could be hit or miss. Only you know the settings you'd like to run and the performance you'd want out getting a second video card -- You may see 20% in some situations or you may see 80%, but as for me, I'll use SLI wherever and whenever I can as long as I'm seeing some sort of performance gain.