[mythtv-users] Fancontrol with replaced CPU fan

[Calvin Dodge]

> doesn't have any PWM control (or Q-fan). So they must do something on
> the motherboard to allow for the PWM control on some of the the 3-pin
> headers, and it is different than whatever they do with the 4-pin
> headers. They are specifically designed so that you can put a 4-pin
> fan on a 3-pin header and a 3-pin fan on a 4-pin header, and they will
> work at full speed, but you won't have PWM control in either case.

I've seen at least 1 motherboard where the BIOS had to be configured
for the type of CPU fan (PWM vs. conventional). I'm guessing other
BIOSes are smart enough to figure that out on their own.

Calvin