I'm not entirely sure that's true, even though it's coming from the SLI site. The motherboard manual says that the board supports both SLI and Crossfire, and has both badges stickered on the box. The board also came with an SLI bridge.
your looking at the wrong version....
the motherboard just isn't that good of a model, you picked the wrong one.
You could do the SLi hack..
you can use hacked drivers but @ 16/x4 it's a waste of time.