What Witcher 2 GFX settings are the most resource intensive on Ultra?

On ultra the game runs about 20 FPS for me which imo is unplayble. On high it runs about 50-70 FPS which is fine. What settings from ultra are the most resource intensive?

Ubersampling!!Sc00p

Shadow quality and motion blur.

What does ubersampling do?

What do you guys think about the game? Also what score do you guys think GS is going to give it? Thnx. robertoenrique

The game is great, but performance is terrible. I think its a driver issue.

Ubersampling, the well known one and I also heard Texture Memory Size is the second most resource intensive but I personally think it could be SSAO, as that really does hog up the resources in most games.