AE CS3 only uses 4gb ram

Hi there,
I am actually using the AE CS3 version on a Windows 7 64 bit PC with 12 Gig of ram. But everytime I use AE, it says that it uses 4 gigabyte of ram only. That's kind of strange, as the OS uses the whole amount of ram.
Is there any solution to it or do I have to upgrade to CS4? Hope not...
Thank you!

The information in that FAQ entry is still mostly valid for After Effects CS3, especially the important point: After Effects CS3 is a 32-bit application, so each process can only see and use a theoretical maximum of 4GB of RAM. However, with Render Multiple Frames Simultaneously multiprocesing, After Effects spawns additional processes that can each use its own few GB of RAM.
Here's the page in After Effects CS3 Help about the Render Multiple Frames Simultaneously multiprocessing feature:
http://livedocs.adobe.com/en_US/AfterEffects/8.0/WS2FD05F13-66CB-47c1-9FD2-7CEE7EDF588F.ht ml
Don't be so quick to dismiss information about CS4 as being irrelevant to CS3 (and vice versa). Most things don't change from one version to the next, so information written for one version is usually still good for the next. (If you're ever unsure, you can use this decoder ring page to see what's changed from CS3 to CS4.)

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