[citation][nom]nevertell[/nom]Maybe I am wrong, but once, some "I know everything about everything guy", who actually is pretty educated, told me that cuda doesn't use sli, but it uses some other way of linking the gpus together and that it scales better than sli AND it works with pretty much as many cards as you can plug in the motherboard.[/citation]
well actually in older versions of cuda, u even had to disable SLI to run your program on more than one GPU, although its not the case nowadays
and yes, although it highly depends on proper programming, cuda pretty-much scales on any number of GPUs