8 pin and 4 pin CPU Power Connections

Discussion in 'Processors and motherboards Intel' started by cousineddie, Jul 26, 2016.

  1. cousineddie

    cousineddie Member

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    Hi,had a new motherboard (Asus X99-A II) which has an 8 pin CPU connection as well as a 4 pin.
    The last motherboard I had only had the 8 pin and I have lost the other 4+4 CPU cable that came with the power supply, my question is do I have to connect both 8 and 4 cables or is the 4 pin just for overclocking as i have read on other sites.
    I dont intend to overclock until i do find a replacement and PC boots into Bios fine just dont know if ill be OK to carry on installing windows.

    Asus have not been back in touch or any replays on forum

    Any help would be great,many thanks[​IMG]
     
  2. jura11

    jura11 Ancient Guru

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    Hi there

    If you do plan to OC in future I would use 8 pin(4+4) connector,this second connector not sure if you are neex to have connected,in my opinion I would say,you don't need that there to have connected

    Yours PC should be OK and you can start or carry on with installation of Windows

    I'm using 4+4 pin for powering CPU and don't have any issue,my 5820k is OC to 4.4GHz right now and everything is very stable

    Hope this helps and good luck there

    Thanks,Jura
     
  3. Hootmon

    Hootmon Maha Guru

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    CPU OPT is usually a Fan header. No idea why that sort of socket is being used.
    In my experience its usually a standard 4-pin fan header connection, like the white one in the far left top in your pic.
     
  4. Extraordinary

    Extraordinary Ancient Guru

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    I've got the same on my board, it's an optional (OPT) extra power for the CPU if you are going for big CPU OCs, to take some of the load off the other connector / part of the board

    If you go for an extreme OC without using it, fire can happen so I'm told
     

  5. SplashDown

    SplashDown Master Guru

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    Yup same as yours, I wish I would have gotten yours, mine works does same thing but you can keep voltages more stable on yours thus less heat. I've got a 0.056 voltage droop on mine so I have to go up a little more on voltage 1.53 with 4.7 because it droops 1.48 that's the bonus for the extra 4 pin.
     
  6. Extraordinary

    Extraordinary Ancient Guru

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    If you have LLC in your BIOS, set that higher to combat vDroop, I had to do that to stabilize my chip

    [​IMG]
     
  7. cousineddie

    cousineddie Member

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    Working fine ,many thanks for the reply's
     
  8. fantaskarsef

    fantaskarsef Ancient Guru

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    If you check your mainboard's manual, page 1-26, it does make an extra statement to connect both 8 and 4 pin ATX12V plugs...

    If it works, good, I'd personally try to grab one of those 4 pin cables or an adapter on the long run. Just my opinion though.
     
  9. cousineddie

    cousineddie Member

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    Asus said they recommend that I fit the two.got a replacement coming from Evga
     
  10. fantaskarsef

    fantaskarsef Ancient Guru

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    Good stuff, did you have to pay for it? Better safe than sorry I'd say...
     

  11. cousineddie

    cousineddie Member

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    17 euro inc postage.
     
  12. fantaskarsef

    fantaskarsef Ancient Guru

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    Well I hope it won't tear you down to ruin, but as I said, I personally would have looked for such a cable anyway, just to be sure.
     

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