CPU usage in ableton raise 2x times (OS X)

[NoroHadzi]

hello... i just started ableton yesterday and my projects which uses about 20-25 percent CPU now use about 40 percent (without changing any VSTs, Samples)... i was checking mine activity monitor and theres no other programs run which use too much CPU or RAM. Do anybody have idea what could cost it?
i tried this thinks: software Cocktail, Disk Warrior, Cleanmymac, reset pram nvram, repair disc permissions and it didnt help., reinstaling CoreAudio Drivers
I was not installing any software except gfxCardStatus and nVIdia Cuda drivers (for chancing GPU - i tried uninstal it , thats not problem)

im running OS X 10.6.6 on macbook pro (mid 2010) with 2.66 Ghz intel i7 processor, HDD 5400 rotation rate,
m-audio fast track pro with 512 buffer size, 44.1 sample rate
Ableton Live 8.2.1

only weird think i notice that can cost it, its maybe Macbook temperature, it goes about 70-80 °C when i work in ableton (or maybe its normal?) and that when i open project, cpu shows about 17-20 percent usage without playing sound (stopped playback).

(sorry for my bad english) i hope somebody can help me

 

[Plumbstone]

You're probably best off asking on the ableton forums really.

40% seems pretty normal though and should still allow you to do plenty of work, is it causing you any problems?

 

[NoroHadzi]

You're probably best off asking on the ableton forums really.

40% seems pretty normal though and should still allow you to do plenty of work, is it causing you any problems?

40% its ok, but project that was using before 40%, now use about 70%, and thats a lot, if i will continue working on it i will be soon on 100% (becouse now every instrument use 2x more cpu)....