Smidlee on 25 May 2010
It's just running the fan at max speed for a few seconds. Even PC fans can be very noisy when running wide open. (PC has software where you can change fan speeds) Nothing to worry about unless the PS3 is getting so hot it has to run the fan at full speed. If that is the case then system probably need to be clean out.
The downside of running the fans this fast is noise as well as sucking in more dust.
