I recently talked a guy through (via a phone hookup) a 7200RPM
IBM Desktar installation into a fanless iMac. 'took me awhile to
sort the case removal (different case design to the fan iMacs I
was used to) - it's been running fine for the last year.

a) Go the 7200rpm. Definitely noticeable.

b) I recently tried some of the new Seagate Barracuda's and found them to be quieter than the IBM (by quite a bit) and generate about the same heat.

Cheers, Antony.

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