Rebooting new mobo shuts down and starts up again

Discussion in 'Processors and motherboards AMD' started by Phroster, Apr 24, 2017.

  1. Phroster

    Phroster Master Guru

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    I just installed a new GA-Z270X mobo (Gigabyte Aorus Gaming 7)

    But when I reboot the whole system shuts down for 2 seconds, and then reboots normally.

    My old mobo kept the power on while rebooting, but this new one does a kind of hard reboot. Turning off the power quickly and then on again.

    I looked through the manual and on the internet to find if this is normal.
    But I can't find anything about this.

    Anyone know if this is normal with these motherboards? Or is there a setting perhaps I am missing ?

    *edit* I see I posted in the wrong sub forum, maybe someone can move this thread?
     
  2. lexer98

    lexer98 Guest

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    My Z97-A does that after being without power (power plug disconnected). I can't remember very well but i had a few motherboard with that particularity. Try without the soundcard, sometimes additional hardware cause that
    But if the system work stable don't worry
     
  3. Agent-A01

    Agent-A01 Ancient Guru

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    It's called memory training.
     
  4. Phroster

    Phroster Master Guru

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    I have seen that setting in the BIOS.

    The system is stable, so I might have a look there.
     

  5. Phroster

    Phroster Master Guru

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    So checked memory training, but that only made the boot before POST longer.

    Also I don't have any peripherals connected.

    Only onboard.

    The problem is that the PC reboots, but shuts down completely for 2 sec, I hear the HDD turn off and on. And then it just boots normally.

    But the whole system goes off for 2 sec. Even all LEDs go out.
     
  6. Agent-A01

    Agent-A01 Ancient Guru

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    Quite a few memory related settings that could cause that.
    I don't have a current gigabyte to help you but on ASUS X99 options such as Memtest, memtraining(set ignore), fastboot = enabled etc.

    You may also see if there is ErP setting, turn it off/on(related to power states)

    Btw if that coolermaster is the old one that I am thinking of, get rid of it and buy a new power supply that actually supports the various power states of that system...

    There is a reason many had issues when haswell was released and subsequent updates to PSUs resulted in "Haswell Ready" in their specs.

    That alone could also be causing your issue.
     
  7. Phroster

    Phroster Master Guru

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    Erp is off.

    And I have looked up those Haswell Ready PSUs, this has to do with C7 states.

    Which I also disabled.

    The problem that could occur with non-Haswell Ready PSUs, was that because of the sleep state the PSU might shut off.

    As far as I know rebooting doesn't require C-states.
    Besides C7 is disabled in the BIOS.

    I'm at a loss here, it feels like the mobo is working as intended, I wouldn't even notice shut down during reboot, if I hadn't any mechanical drives (ancient RAID HDDs) that made noise during shutdown.
     
    Last edited: Apr 25, 2017
  8. lexer98

    lexer98 Guest

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    I just tested the same motherboard you have in my job (for curiosity lol) and doesn't have the problem you describe after the first boot
    You have the last BIOS ?
     
  9. Phroster

    Phroster Master Guru

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    Yes I updated the BIOS.

    I also contacted Gigabyte, they actually say it's normal, but it could be caused by UEFI or legacy installation of windows. (I used UEFI)

    Or that it might be caused by the HDDs.
     
  10. Phroster

    Phroster Master Guru

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    So, removed the SATA HDDs, no difference.
    Put the NVMe SSD in a different slot, no difference.

    Now I loaded optimized defaults, and now it boots normally!

    So I OCed the CPU and RAM again. Still good.

    So there is some setting, probably related to UEFI, but I can't find out what it is.

    I had an ASUS Sabertooth before this, but this new mobo is really complicated.
     

  11. Phroster

    Phroster Master Guru

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    So I narrowed it down. Somehow if I change anything under the chipset tab in the BIOS. The problem returns.

    These are the LAN controller and virtualization.

    So that seems not normal to me, I'm going to contact Gigabyte again.
    But so far the BIOS seems really buggy.
     

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