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PSU Connection troubles. (EVGA Supernova G3 850)

Hi

I'm working on my first build in long while and have run into a problem connecting my PSU to my mobo and GPU.

My power supply is the EVGA Supernova G3 850w. My mobo is the ASRock Fatality X370 Professional Gaming. GPU is Aorus GTX 1080 Ti.

1. Mobo - The Fatality mobo has an 8 pin ATX12V1 power connector for powering the CPU. The CPU power connector provided by the EVGA PSU is an EPS 8(4+4) pin. For the PSU CPU connectors, the pin shapes do not fit those on the mobo ATX12V1 connector. One half of the 4+4 fits, but the other does not. Will I need an adaptor cable to be able to connect the PSU to the mobo CPU? I have not read anywhere that this PSU and mobo are not compatible, so I'm not sure why the proper cable isn't present.

2. GPU - The Aorus 1080 Ti has two 8 pin power connectors on the card and comes with one adapter (6+6 pin to 8 pin). I was able to use one of the PSU cables (6+2 x2) to connect via the adaptor that came with the GPU, but this leaves one of the 8 pin connectors on the card empty. With no other adapter, I seem to be stuck, as the PSU cables (6+2) do not fit the 8 pin connector on the card. Will I need to find another adapter?

My main question is, am I going to need to get adapters to fix these two problems, or is there a way to make the connections work? Maybe some backward compatibility where pins with tapered corners can safely be placed in square pin slots (if that were he case, everything would fit). If I do need adapters, can they be found easily on Newegg?

Thanks
Reply to terra_incognita
4 answers Last reply Best Answer
More about psu connection troubles evga supernova 850
  1. Best answer
    You're doing it wrong.

    The 4+4 CPU connector does fit the mobo, you're just failing to put it in right.

    The 6+2 PCIE connector = 1 8pin connector when combined.

    You don't need any adapters.

    You may have to plug the 2nd half of those pins in first, so plug in the +2 and plug in the +4 side first.
    Reply to James Mason
  2. James Mason said:
    You're doing it wrong.

    The 4+4 CPU connector does fit the mobo, you're just failing to put it in right.

    The 6+2 PCIE connector = 1 8pin connector when combined.

    You don't need any adapters.

    You may have to plug the 2nd half of those pins in first, so plug in the +2 and plug in the +4 side first.



    I was hoping that that was the case. The only thing giving me pause was the mismatched pin shapes. Images here: https://imgur.com/gallery/iS94r

    The last thing I want to do is plug in an improper connection and fry anything.
    Reply to terra_incognita
  3. Some shapes are slightly mismatched, but they still fit (the corner cut ones fit in square holes, but not vice versa)
    The Clip goes on the back side of the GPU, and the CPU clip goes on the outside edge of the motherboard.

    They're made connectors virtually idiot proof so you can't plug them in the wrong way anymore.
    Reply to James Mason
  4. James Mason said:
    Some shapes are slightly mismatched, but they still fit (the corner cut ones fit in square holes, but not vice versa)
    The Clip goes on the back side of the GPU, and the CPU clip goes on the outside edge of the motherboard.

    They're made connectors virtually idiot proof so you can't plug them in the wrong way anymore.


    Idiot proof? Sounds like a challenge to me. But really, thanks for spelling this out for me. This answer is what I was suspecting, but there's no way I'd risk it without asking first.
    Reply to terra_incognita
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