Since PWM gives the motor bursts of variable duration 12v from its input, If that input was 17v would not the fan run MUCH higher rpm @ 100% pwm? That seems obvious Also obvious is the motor would start heating up dramatically. But could this be helped by finding exactly which part of the motor was generating the heat and beefing up the cooling of that part ? Could the first overvolt overheating part be fixed so it does not fail ? My 200mm 800rpm case fan is on its way, and I like the idea of being able to overclock it to 1500rpm. Possibly a cpu HS& fan to cool it down ? OR A Waterblock, so I could have a watercooled HS fan on my air cooled CPU.