Snow Leopard: Macbook Pro Video Card switching + SLI

[lupin.terzo]

Hello guys! I own a 2009 Macbook Pro. I was just wondering 2 things about Snow Leopard:

1. How does it manage video card switching?
2. Does it allow SLI?

Appreciate your help.

Thanks,
Andrea

 

[penrodcc]

Video card switching...

I'm also curious. After upgrading, I no longer see the video card switch option under Energy Saver.