System Perf & Ram Unused On Imacg5 Options

[thefreak6767]

heLLo,

Been using logic for several years now on G4, and powerbook, and now I'm also using an iMac G5(2Go ram).

My question is:

How come that in the little CPU window in logic the audio level, sometimes, is nearly full, whereas I'm only using about 800Mo Ram and I still have 1200Mo Ram available (shown by MenuMeters)??

This happens of course when I'm using lots of plugs/audioTracks/etc..which I understand. But why is it not taking full advantage of the 2Go of ram?

Used: LogicPro 6.4.

Thx in advance,

FreAk*