"The Turbo-Cool 1200W power supply was not designed to be quiet; and
its not. The primary design goals were to deliver stable, clean outputs
with high reliability for high-end workstations and servers. To accomplish
that you need good cooling, which in this case, requires a relatively
high-speed fan. If you need a 1200W power supply, you will most likely be
dealing with noise from numerous other component cooling solutions
dissipating all that power."