HOw much voltage is required for fans?

[say7essica]

Hi, i have 2 noctua nf-f12 fans and a 4 pin y splitter cable, my questions are...

a. 1 fan requires 12V, if i connect them both with the splitter cable, would it mean it requires 24V to power it up?

b. if i had a 5V fan and use a 9V to power it, is it bad? and what happens if i power it using less than 5V?

i know it sounds like a dumb question, but i just want a confirmation.
Not planning to connect to a motherboard or a psu, its kind of like an experiment you might say.

 

[n0ns3ns3]

fans are usually 12V.
the voltage remains the same regardless of the number of fans. what changes is the current (measured in Amperes).
for 2 fans you have nothing to worry about, just connect them with the splitter to whatever header on your MB.
Using 9V for 5V rated fan can burn it. the fan will try to spin much faster than it was designed to.
at lower than rated voltage, the fan will spin slower.

 

[say7essica]

at lower than rated voltage, the fan will spin slower.

spins slower but will there be any damage or something? its not bad is it?

 

[n0ns3ns3]

your fans were supposed to come with adapters that basically reduce the voltage to allow the fan to spin slower and produce less noise.
this is also the way that DC fan controllers work - they reduce the voltage to spin down the fans.
there is no harm in running fans on lower than rated voltage

 

[say7essica]

your fans were supposed to come with adapters that basically reduce the voltage to allow the fan to spin slower and produce less noise.
this is also the way that DC fan controllers work - they reduce the voltage to spin down the fans.
there is no harm in running fans on lower than rated voltage

thanks a bunch, really appreciate the help 😀