Just a little additional feedback, it does help a bit during modeling and texturing. It will use both processors for area renders too. So as you are building your model, texturing, and doing area renders to check your progress it helps. Additionally it's nice to have a bunch of stuff in the background running and not impacting your Carrara performance. The real fun is being able to turn off SMP in Carrara, render, and then go play your favorite video game at full speed at the same time.

I'm on my 3rd dual processor box on the PC side, it's not much more for a dual rig these days and I found they delay my upgrade itch by about 6 to 8 months. In the long run it saves me money.

Eric Winemiller
Digital Carvers Guild
Freeware and commercial 3D extensions
http://digitalcarversguild.com

Eric Winemiller
Digital Carvers Guild
Carrara and LightWave plug-ins