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Thread: Motherboard sockets

  1. #1
    Formerly known as Andehh Andeh13's Avatar
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    Motherboard sockets

    I have a couple of computers I am trying to hamfist into a carPC. One of the options I have, the main chunky motherboard plug (from the PSU) has 4 socket pins extra at the end, when I plug the chunky power cable in.

    Why does it have these extra 4 sockets? Can I do without them, or do I need an adapter etc to convert my chunky-but-4-plug-less?

    it is an Asus A8n SLI motherboard for anyone interested. Excuse the technical terms, i have come across it before but never had an issue as the PSU had the additional plugs for it.

    edit: With a poxy graphics card & 1 IDE hard drive, do you think the A8N-SLI would consume less than 160w? It seemed to when I plugged it in (ie it ran) but I couldn't get anything to display on the screen, but I put this down to a dodgy graphics card? If the motherboard wasn't getting enough power doesn't it beep madly at you?

    Thanks

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    (evil grin) ehhhhhhh's Avatar
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    Re: Motherboard sockets

    it's backwards compatible, so you can use it without the additional 4 pins..

    quote from wiki:

    The main ATX power connector was extended to 24 pins (it is backwards compatible). The extra four pins provide one additional 3.3 V, 5 V and 12 V circuit.

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    Re: Motherboard sockets

    If the board has no space for them, they should detach, they are to give extra power for newer boards IIRC.

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    Senior Member mikemikemi's Avatar
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    Re: Motherboard sockets

    Sounds like you have a psu with a 20+4 main power connector.

    The extra 4 pins came in on a revision of the ATX standard to provide additional power for PCIe. The +4 allowed the psus to be backwards compatible with 20pin boards

    You shouldn't need them on your board if there's no support for them.

    Edit: Beaten to it, should type faster

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    Re: Motherboard sockets

    Haha

  6. #6
    Formerly known as Andehh Andeh13's Avatar
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    • Andeh13's system
      • Motherboard:
      • Gigabyte GA-P35
      • CPU:
      • Intel Q6600
      • Memory:
      • 4gb Corsair XMS2 800mhz
      • Storage:
      • 1 x 250gb Western Digital AAKS, 2 x 500gb Western Digital AAKS, 1TB WD Caviar Green
      • Graphics card(s):
      • BFG Geforce 8800GTS 512mb
      • PSU:
      • Corsair HX520
      • Case:
      • Antec 900
      • Operating System:
      • Windows 7 64bit
      • Monitor(s):
      • Samsung 24" & Sony 17"
      • Internet:
      • Virgin 10mb... hate them!

    Re: Motherboard sockets

    I made a complete hash of describing it, my apologise. Just to confirm, the PSU plug doesn't have the last 4 pins, so when I plug it into the MOBO, the MOBO has 4 slots left over at the end. This will still work, right?

    Now, the fact these last 4 pins on the MOBO aren't connected, could that be why the graphics card doesn't seem to work? Could it be the other PCI slot that is powered, and the additional (SLI) PCI port that my graphics card is plugged into is?

    Thanks guys

  7. #7
    (evil grin) ehhhhhhh's Avatar
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      • Motherboard:
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      • CPU:
      • Intel i7 6800K@4Ghz
      • Memory:
      • 32GB Corsair DDR4 2400
      • Storage:
      • Samsung 960Pro 512GB nvme
      • Graphics card(s):
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      • Case:
      • Corsair Obsidian 800D /w 240RAD
      • Operating System:
      • WIN10 PRO 64Bit / Debian
      • Monitor(s):
      • 3x DELL 2413

    Re: Motherboard sockets

    It should work, I've an older psu for testing motherboards and it has never been a problem.

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