You might try asking at an Nvidia board. I know the sims game tends to prefer to manage video itself and traditionally it's not so friendly toward Nvidia. I went to ATI Radeon for that very reason. Mostly, I set the video options to be managed by the game. I have less trouble that way.
Sorry, a bit of misunderstanding. It's not a problem of not knowing how to set AA, or what to set it at with the Nvidia or Sims 2. With most 3d games, when you go to adjust AA in game, you are given full text of what your setting the AA at. I'll use Left 4 Dead 2 as an example. In the AA settings in the game, with my Nvidia it shows I have access to - None, 2x MSAA, 4x MSAA, 8x CSAA, 16x CSAA, 8x MSAA, 16xQ CSAA In that specific order.
With Sims 2 all you are given in game is a slider with no labels or information as to what each position is. With my Nvidia card and Sims 2, I have no way to know what each of the positions on the slider are. Is it 2x, 8x, 16x. Is it CSAA, MSAA.
The number of AA settings available varies from game to game as well. Left 4 Dead 2 has 7 settings, Sims 2 has 9 settings. What are the extra AA settings Sims 2 has access too, that Left 4 Dead 2 doesn't.
Thats the information I'm hoping another Nvidia user might be able to supply.