Gigabyte B550 Aorus Pro AC won't shut down, keeps rebooting

Discussion in 'Processors and motherboards AMD' started by Keitosha, Sep 17, 2021.

  1. Keitosha

    Keitosha Ancient Guru

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    GPU:
    Gigabyte Vega56 8GB
    When I add a PCI-e card, say an USB3, sound or any card my system keeps booting upon shutdown.

    I cannot shutdown the machine (S5), it keeps booting up right away. Even with hibernation off.
    Without an additional PCI-e card besides the GPU my system shuts down correctly and remains off.

    I've turned off WoL, but no luck.

    I want my system to stay off when shutting down when adding any PCI-e card.

    Plus my power LED remains lit when powered off. I have a 2-pin power LED.

    This happens on all PCI-e slots and with any PCI-e card. No additional PCI-e cards, no problem.

    CPU: R5 3600
    Memory: 2x32GB Corsair CMK64GX4M2D3600C18
    Mainboard: B550 Aorus Pro AC bios 14c
    GPU: Gigabyte RX VEGA 56 GAMING OC 8G (bios F5)
    Storage: 500GB Crucial P5 NVME, 2TB Crucial BX500
    PSU: Corsair RM850 (2021)
    Case: ANTEC VSK-4000B U3/U2
     
  2. KissSh0t

    KissSh0t Ancient Guru

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    How old are the PCI-e cards that you are using?
     
  3. Keitosha

    Keitosha Ancient Guru

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    GPU:
    Gigabyte Vega56 8GB
    Soundblaster Z (2013), some USB3 cards from Amazon this year, Soundblaster AE-7 (2020), Gigabyte GT1030 2GB GDDR5 (2019).

    Doesn't matter what type of card I use. It's like it has a constant 'wake by PCI-e device' state. Such an option is not selectable within the bios, but that would disable WoL as well.

    EDIT:

    Quoting myself from the Gigabyte forums where someone suggested it was a power issue in DP cables. https://forum.gigabyte.us/thread/13151/b550-aorus-shut-keeps-rebooting

     
    Last edited: Sep 18, 2021
  4. Truder

    Truder Ancient Guru

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    I had this problem with my old Intel system and for me to resolve it (was a gigabyte board), I had to disable fast start up. Certainly was weird however I'm not sure this will be the solution for you but wouldn't hurt to try.

    Maybe when your PC shuts down, your board is seeing it as a powerless instead and is trying to resume as a result? Try to change the option of what the board does on power loss in BIOS?
     

  5. Keitosha

    Keitosha Ancient Guru

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    Was thinking it as well, but I already disabled fast (or ultra) boot.

    This is a weird and annoying issue.
     
  6. Truder

    Truder Ancient Guru

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  7. Keitosha

    Keitosha Ancient Guru

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    Somehow it got fixed by itself (although Gigabyte acknowledged the issue and escalated it) by turning on ErP. That powers off all ports, but unfortunately negates WoL. But for now this works. Weird since I changed nothing. It also shuts down correctly if I leave an USB device on my USB3 card.
     
  8. umeng2002

    umeng2002 Maha Guru

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    My B550 Pro V2 sometimes has the same issue where it won't turn off the USB ports long enough and that locks up my Logitech keyboard (lights stay on, but no input). It even keeps the lights on when I command the computer to shut down. Only power cycling the PSU and unplugging and re-plugging in the keyboard brings it back.

    If enabling ErP is a work around for now, I'll try that.
     

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