Other Thoughts: For all you computer junkies, approximate fan speed varied by voltage:
6V = 1325 RPM
7V = 1575 RPM
8V = 1800 RPM
9V = 2000 RPM
10V = 2175 RPM
11V = 2400 RPM
12V = 2600 RPM
Use a 50ohm, 10watt power resistor in series to achieve ~7.4V = 1700 RPM, or 25ohm 10watt resistor to...