4-wire fan trouble, pin functions ?

digitaldreams · 30 Apr 2010 at 21:13

Hi folks

My Zalman fan has started to play up, stopping, starting, going slow etc (esp during the first 10 minutes or so). Bad connections have been ruled out & I suspect the fan is fine. The fan cable & plug have 4 connections, the only other sockets on the motherboard are 3-pin. I also have a spare 3-pin fan controller....

Can I connect the fan direct to the 12v to confirm the motherboard is at fault ?, which wires if so. How about the 3-wire fan controller, which of the 4 fan connections do I connect to the 3 of the controller output ?

Regards..

DIABLO · 1 May 2010 at 00:12

Yellow is 12v, black is ground so they are power definatly, green is RPM and Blue is the PWM signal i believe.

SupermotoMX · 1 May 2010 at 00:36

DIABLO, is correct.

have you tried bios update? it fixed PWM function of my mobo when i first had it (randomly spinning up to 100% for no reason)

digitaldreams · 1 May 2010 at 20:33

DIABLO said:
Yellow is 12v, black is ground so they are power definatly, green is RPM and Blue is the PWM signal i believe.

Thanks Diablo..

digitaldreams · 1 May 2010 at 20:34

SupermotoMX said:
DIABLO, is correct.

have you tried bios update? it fixed PWM function of my mobo when i first had it (randomly spinning up to 100% for no reason)

Did that in past....gone again !, ran out of updates but cud try last one again...

p.s. not the mobo in my sig.....an older one.

Akempster · 5 May 2010 at 21:34

just to point out if you connect to a mollex cable they are as follows

yellow: v
blacks ground
red 5v

make sure to connect to the right grounds otherwise it wont power up. you need to connect to the nearest black cable of the voltage you wish to use ^^