512 of dedicated RAM on the PS3. 256 video 256 for system.
I do believe that the cell chip has 256 of sharable RAM and the GPU has 256 of dedicated RAM as well.
The 512 of RAM is XDR RAM which from what I understand is faster and more efficient than standard comparable PC RAM.
Consoles require less RAM than PCs because they are normally running less or the applications are less memory hungry. (The OS for example)
This post was edited on 1/31 at 1:59 pm