The speed that a fan runs when at full voltage is its natural design speed, so its life won't be adversely affected by running at this speed. If the fan is connected to the CPU Fan connector, the default BIOS setting should be to protect the CPU against fan failure, with audible warning and power-down. If the connection is to another connector, say Chassis Fan, this may or may not be monitored, but a board normally will not boot without a CPU Fan connection unless the CPU Fan monitoring has previously been disabled in the BIOS. (Fitting of the CPU fan to another connector could also be a cause for the fan speed not adjusting.)
You could fit a quieter CPU fan, either way the CPU will only benefit from running cool.
I checked the manual for that model board, and indeed there seems to be no mention of q-fan, although Cool&Quiet is covered. Some boards rely on the stock AMD cooler having a fan with an integral thermistor. When the Cool&Quiet software clocks the CPU down in idle periods, the cooler reduces in temperature and the fan itself slows down. Under load, the CPU is ramped up and when the cooler gets hotter, the fan speeds up. Your board may need the cooler with temperature sensing - third party manufacturers have equivalents to AMD's own design.
Edited by Platypus, 07 March 2007 - 09:03 AM.