i got the new high end mbp. 2.2Ghz, 1gb gpu, i7 SB, 8gbram ive got multicore rendering enabled on after effects, still when i start a render it goes up to 40% usage of all cores. but then after like 10 seconds backs down to only 15% and takes ages to render anything out. my virtual cores are only sometimes actually doing anything. Sometimes i hear the fans kicking in and then for about 5 seconds it runs on full speed. This happes mostly when AE is not doing anything intensive. im using cs5. why cant it take up atleast 80% of my processors? what is the bottleneck here? There is 1gb ram free.