Can't really comment on how quiet my computer is, but I have taken steps to
reduce the noise; most recently, the installation of a Zalman 7000 HS/fan.
The only other fans in my system are in the Antec PSU, and they're set down
to minimum speed. So I think that my system is fairly quiet. It's also
fairly close to where I sit, in that I can reach over and install CD's in it
without really stretching, and I was running it with the cover off. All in
all, I think I'd know if it was making annoying noises.
Installing the Seagate drive made a HUGE difference to the sound levels of
my system, as I had a irritatingly noisy Maxtor drive that got replaced.
But that was a continous high-pitched noise on a 2 year old 7200 rpm drive.
In that drive, I could set the "Acoustic Management " something-or-other to
set for quiet or performance. Changing that made a difference in the seek
noise, but didn't do a thing for the high-pitched whine.
Clint