Bueno por ahi lei un comentario de un usuario al que le pasaba lo mismo, inclusive extendio su queja al al support team de sims3, pero no encontro respuesta, menos microsoft... asi que los unicos que le respodieron fueron Nvidia (los chicos de la tarjeta de video

) que le sugirio un driver para mejorar su tarjeta de video.
Vayan a las paginas y vean si hay una optimizacion para las tarjetas de video que usen, aquellas que mejoren la experiencia con vista y windows 7... por ejm Nvidia a mi version le agrega esto:
Adds support for OpenGL 3.2 for GeForce 8, 9, 100, and 200-series GPUs and ION GPUs.
Accelerates performance in several gaming applications. The following are examples of improvements measured with version 191.07 drivers vs. version 190.62 drivers (results will vary depending on your GPU, system configuration, and game settings):
Up to 12% performance increase in ARMA 2
Up to 8% performance increase in Batman: Arkham Asylum with GPU PhysX enabled
Up to 50% performance increase in Call of Juarez: Blood in Bound with SLI enabled
Up to 14% performance increase in Fallout 3 (indoor scenes) with antialiasing enabled
Up to 10% performance increase in Far Cry 2 (DX9 version) with antialiasing enabled
Up to 34% performance increase in Prototype with antialiasing enabled
Adds SLI support for Aion, Darkfall, Dawn of Magic 2: Time of Shadows, Dreamkiller, Fuel, Majesty 2: The Fantasy Kingdom Sim, Need for Speed: Shift and more.
Includes numerous bug fixes, including the following key fix (additional bug fixes can be found in the release notes on the documentation tab): For graphics cards supporting multiple clock states, 3D clocks correctly return to 2D clocks after exiting a 3D application.
Estoy descargandolo ahora, lo pruebo y si me resulto les aviso.
Por cierto el problema que me generan los mods es que me ralentiza el juego y la carga demora demasiado.
Saludos