Oops! I meant to post some general tips on getting better Assembly Room and Carrara performance.
The Interactive Renderer (the up arrow within a circle) is very helpful. You can use software or OpenGL for the Assembly Room renderer. Unless you have driver issues with your graphics card, OpenGL would be the way to go. The Interactive Renderer has nothing to do with the Render Room. These settings are scene specific, so every scene you start you will have to set the renderer. Some people make and save a default scene with their preferred settings.
There are some settings you can tweak or turn off to ease the load on your card if it becomes an issue. The default texture size is pretty large, to speed things up, and reduce the overhead on your graphic card’s memory, lower it’s value. You can also turn off transparencies, etc.
To help with Carrara’s memory handling, you can go to the file menu and open the preferences menu. From under the imaging and scratch disk section, try lowering the texture spooling. The initial value is based on how much RAM you have installed. The more RAM the higher the value. The slider defaults to about the halfway point. I have mine at around 70 MB. As far as I know there is no hard and fast rule, just that lower can be better. This is a global setting and will stay the same until you change it. You will also need to restart Carrara after making any changes.
This has been mentioned in many threads by many different people, but makes sure you clean out your temp. file. If you don’t know the path, or want to change the location, you can refer back to the image and scratch disk section of the preferences.