the cooler on my a64 is at 4000rpm when idle, on a normal 30C day, and when its a 25C day, the cooler is at 3300+/- rpms, and after i game and the system is still hot, it is at 5000rpm.
the temp of my cpu is the same, 45C. so, if it is CnC controlled, then somehow i think it is really screwed up as im idling thoroughtout all 3 scenarios