Hardware pinouts information and cables schemes

Apple Motherboard 4 pin CPU PWM fan connector specification users reports and reviews

[Discuss at the forum] [SUBMIT new pinout]

There are 4 approved reports in our database

Date Content
User opinion Comment Approved by moderator?
2013-01-27 00:22:00rev. 1CORRECTAPPROVED
2014-11-26 23:59:43rev. 2ERROR FIXEDPin 4 is noted as a PWM signal. While it can be driven by a 5 volt digital PWM signal, it is, in fact, an analog fan speed control signal. 0 volts = off, 5 volts = 100%, 2.5 volts = 50%, ...APPROVED
2015-04-25 09:51:44rev. 3CORRECTNo Errors, Just wish I would have found this sooner before burning up an apple delta 40mm franticly trying everything to get it to spin in my pc. APPROVED
2015-04-25 09:55:43rev. 3CORRECThowever on a 40mm delta fan from say an Xserve the pinout is in a different order and with different colors, 1 is red two is black three is blue and for yellow this is red 12v black gnd blue pwm and yellow is signal.APPROVED

History of users contributions

Date Content
Author Comment

Back to Apple Motherboard 4 pin CPU PWM fan connector pinout

Pinouts.ru > Pinout of Apple Motherboard 4 pin CPU PWM fan connector
should be correct