o Correct re 12V
---- it will generally blow the fan tacho monitoring circuitry
---- which can be by smoke, and may affect the chipset
o You can have 1 pulse per revolution on some fans
---- however far more usually it is 2
Note some motherboards have an option to set a divider
for the tacho pulses. It depends on how much the BIOS
writer abstracted from assumed to user-configurable.
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