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Thread: No post, new build

  1. #1
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    Question No post, new build

    Hi everyone,

    I'm trying to assemble this new PC but it simply fails to boot, no post at all


    PC Specs:
    CPU: Intel i7-4770k
    CPU Cooler: Noctua NH-D14
    Mobo: AsRock Z87 Extreme4
    PSU: Seasonic Platinum 660W V2

    I took the mobo out of the case only plugging in the components listed above and still have the same results.

    I can't figure out how many pins I need to have connected to the mobo and PSU.

    On the other end of the ATX Power cable (20+4 pin), I have two options to connect to the PSU:
    18 pins or 10 pins
    PSU: https://i.imgur.com/TBr6PWj.jpg

    Nothing happens if the18 pin is connected to the PSU.
    But with the 10 pins connected the fans will briefly spin (fans won't spin again unless I regplug the power cable)

    The above scenario was tested with the full 24 pins connected on the mobo
    I don't know if I'm suppose to be using the full 24 pins or just 20.

    With the mobo , again I am given two options:
    Use a 24 or 20 pin to the ATX Power Connector
    Use a 8 or 4 pin to the ATX 12V Power Connector
    Mobo Connectors: https://i.imgur.com/FoTqiWa.jpg

    -----

    TL;DR

    How many pins required to plug into the motherboard and PSU?

    Reference:
    Mobo Connectors: https://i.imgur.com/FoTqiWa.jpg
    PSU: https://i.imgur.com/TBr6PWj.jpg

    ATX Power Connector:
    Mobo: 20 or 24-pin?
    PSU: 10 or 18-pin?

    ATX 12V Power Connector:
    Mobo: 8 or 4-pin?
    PSU: 8-pin only

  2. #2
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    Default

    your PSU came with one "M/B 24/20 Pin Connector x 1 (610mm)" right?

    go ahead and use all 24 pins to the MB.

    the other end of this cable should mate to the 18 pin on your PSU.

    regarding the

    ATX 12V Power Connector:
    Mobo: 8 or 4-pin?
    PSU: 8-pin only

    go ahead and use the 8 pin.

  3. #3
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    Default

    Quote Originally Posted by Permelia View Post
    On the other end of the ATX Power cable (20+4 pin), I have two options to connect to the PSU:
    18 pins or 10 pins
    PSU: https://i.imgur.com/TBr6PWj.jpg
    I don't think you have an option - both the 18 pin and 10 pin connectors are plugged in at the same time.

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