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I am using Gigabyte B450 Aorus Pro Wifi motherbard, AMD Ryzen 7 2600x, Corsair DDR4 2x8GB 3200Mhz RAM (CMK16GX4M2B3200C16). My OS is Windows 10 64-bit.

I have this weird problem with my desktop PC. Sometimes, PC fails to boot up because I cannot see the bios boot-up screen. To fix this problem, I have to pull out the power plug, wait for a pop sound, then put back the power plug. Now, I can see the bios boot-up screen on boot-up. The problem is this action of pulling out and plugging back the power plug sometimes causes the BIOS settings to be reset to default. This happens sometimes only when I was using bios firmware version F2. Yesterday, I upgraded bios firmware to F5. Now, the action of pulling out and plugging back the power plug ALWAYS causes the BIOS settings to be reset to default.

This is a problem because I need to change BIOS settings to use 3200Mhz RAM clock and run Ubuntu virtual machines on Virtualbox.

I bought the motherboard a few weeks ago. It is unlikely the battery can run out so soon.

  • Sounds like the board is bad. Maybe you should RMA it. – Appleoddity Mar 11 '19 at 5:05
  • I'm ignorant. All the components are mounted on the motherboard. What is an easy way to RMA the motherboard? Plug out all components and send board to manufacturer? – curious Mar 11 '19 at 5:31
  • Yes. If the board is new then open a case with the vendor or with the manufacturer to have it replaced. – Appleoddity Mar 11 '19 at 5:34
  • @Appleoddity, thanks. I guess one has to bite the bullet. The problem is ... for some people, downtime is more costly than the motherboard itself. Never expect this will happen. Gigabyte is a brand name for motherboards. – curious Mar 11 '19 at 5:36
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    I understand. Contact the manufacturer, they may have tech support who can solve the issue. But if the board is bad, and it sounds like it is, you’ll have to replace it. If downtime is a problem, see if you can do what is an “advanced” replacement. You’ll pay for a second board and the manufacturer will ship it to you, then you’ll ship the defective back and get a refund. – Appleoddity Mar 11 '19 at 5:37
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I will answer my own question.

After I uninstall Avast anti-virus software, my problem with BIOS not being able to retain settings was solved. This solution is specific to my PC. May not work for others.

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