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silly question here..but i need a help

sharip dx
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i want replace a stock fan corsair h100i with Enermax Magma..but i get confused with the fan connector..connector from h100i is 4 pins while connector slot at enermax magma just 3..u guys can refer the picture i attached. can i just connect them? but if i do so..there is 1 pin is not connected to slot.thx in advance !!

post-32862-0-73757600-1381587561.jpg

post-32862-0-87960300-1381587568.jpg

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yes

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Yes, the 4th pin is an optional PWM pin which helps with fan control (if your fan supports it) but is not required.

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The 4th pin is the PWM pin.

You can still plug 3pin fan connectors into it, you just leave the 4th pin alone.

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