Hello, New owner of a Alum Macbook 2.4/4gig coming from a Macbook Air Rev B/SSD. My question about the Macbook is the fans, I feel like even when just Safari is on, my fans are on at a constant hum at 1994rpm-2000rpm. Is that normal? Even when nothing is open? My Macbook Air was dead silent but then again that was with ssd. Would like to hear your opinions.