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4-PIN PWM Support, eh, what ?

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  • 15-01-2015 9:46am
    #1
    TheMasterPrawn
    Registered Users Posts: 26 ✭


    Ok, I think I might be going crazy, but I am not sure.

    I have bought a number of fans as I got a MSI Z97 Gaming 5 motherboard and noticed that it has a number of system fan connectors that are 3 pin. I got a Corsair Sp 120 Quiet edition pair of fans with "pwm 4 pin support" , but lo and behold, when I opened them up they are 3 pin connectors.

    What does 4 pin support do for me when I only have 3 pins. I have got 2 sets of fans now and they are all 3 pin. I have other woes with the MSI I will detail elsewhere, but anyone who has gone through this hell, please weigh in , there are lots of confusing and mis leading posts out there, but i would like to hear from someone who has experience of this.

    Rob
    Tagged:


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    #2
    Wossack
    Registered Users Posts: 7,015 ✭✭✭Wossack


    I think you meant to say your motherboard has 4 pin system fan connectors (Ill call em sockets)

    I reckon the fans are just '4 pin pwm compatible', in that a 3 pin fan can plug into both a 3 and 4 pin socket. Just without the 4th cable, there is no actual PWM control... any link to the fans? Doesnt sound right, or worth specifying, as ALL 3 pins work in 4 pin sockets (afaik)

    The difference between 3 pin (+voltage, ground, rpm) and 4 pin, is the addition of that PWM signal cable - so without it, I dont know how they can claim to be pwm supported


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