SMC fan: why does it let my fan go down to 1800rpm, when lowest default is 2000?

[handydandy]

the lowest possible the unibody macbook's let the fan run at is 1800. and the smc fan says that it will not let it to a lower rpm than what the computer is designed. then why does it allow my notebook to run at 1800 when i turn it all the way down?

oh, and any disadvantages to using smc fan?

[philipxz]

The lowest my Mac has gone to is 1987 RPM. :p

[handydandy]

The lowest my Mac has gone to is 1987 RPM. :p

well yea, the lowest mine goes without smc is 1997, but with smc set up with lowest being 1800, it actually goes down to 1800.