P5 and amd quadcore

I have been using P5 lately on W7 64bit machine and whatching how it uses cores with Core Temp program. As a observation one should note that CPU's these day are using scaling, in that P5 will appear to be using a lot of resources. It was at 15% with nothing loaded when I looked at it initially, however what I was looking at was the CPU downscaling the speed at which it ran probably to conserve power I wonder whether P5's CPU meter will only read according to the speed it is running at? Core temp showed the CPU's speed upscaling dramatically through a track. Another thing I noticed is that it switched from one core to another sometimes and back again for the highest load! There also appears to be activity of between 1 to 20 percent on the other cores!

I wonder whether some of this is because my MAudio driver which is 64bit is using some of the processing power of my CPU, or maybe some of the Plugs like rapture. Is so then it appears that in some ways P5 can still benefit from multicore systems. Anyone with enoth tech knowledge to confirm this?

The Project5 audio engine and the Project5 User Interface run in different threads, but as from what I recall in discussions with P5 developers through this forum that is the extent of the multi-threading in Project5.  So it isn't fully threaded and optimized for multicore the way SONAR is.  Certain plugins or other software (like rewire) might be able to take advantage while running with P5, though.