Asus N56V switch graphics cards?

[ernielongse]

I just got a asus N56V notebook and it came with nVidia Geforce 635m. But in dxdiag it says the graphics card is Intel blah blah blah, which i know is integrated. Now I am running windows 8. I have tried going into bios, but i can't access it for some reason. I have tried f2 f8 f12, and del and insert but nothing. I have also went into device manager in control pad and found nvidia and intel, disabled intel, but then it resorted to Windows basic graphics thing. I have tried everything and have searched the web from top to bottom. Can anyone help?

Thanks