I use a windows program to encode my albums in flac format to mp3, using windows xp pro with paralells desktop 5.0. I have noticed a difference when doing this from my external hard drive connected via firewire 800 to my macbook pro. The encoding speeds are twice as fast, but during it, I can hear the fans kick in on my macbook pro, I looked in istat pro, & the cpu went up as well as the fan speeds, cpu was at about 143 & the fans at about 3000 I dont remember the exact speed. The external hard drive has a hitiachi deskstar 7200rpm 1TB hard drive in it with 32mb cache, in a macally enclosure. Is this normal? or will I risk burning out my laptop? I thought firewire 800 did not use the computer's cpu? I may do a comparison & do this all with hard drive connected via usb 2.0. I do remember when I used usb before, that the encoding was slower, but I did not check fans or temperature. With usb 2.0, I dont remember hearing the fans as I do now. would it be safer for my laptop to use usb 2.0? even if it is slower?