Jan 22, 2011 · No yours is the new Q-Fan. The old one would tie all the 3 pin fan headers (except the psu one) to one setting and you got three choices: standard, turbo, and silent. The cpu had the same kind of settings but it was only for itself and as far as I know only works with 4 pin pwm fans.
Jan 17, 2011 · So, PWM speed control of a standard fan is indeed very different from PWM speed control of a PWM fan… Nidec even goes so far as to say that modulating the main supply voltage is not advisable: Pulse-width modulation of DC operating voltage to modify fan speed is not recommended. www.de.comp.hardware.kuehlung-laermdaemmung.narkive.com