[Solved] Systems hangs that require hard reset

I am having issues with my computer hanging frequently. It seems to have started after I updated the bios and did a ram swap to test if increasing my ram would help with running a 7 Days to Die multiplayer game. I reseated the RAM after the first hang up and and the second hang up resulted in my SSD not being recognized by any device. Bought a new SSD and installed Manjaro (originally using Ubuntu) and the system hangs upon entering the OS after login.

My setup:
Ryzen 3700X
Asus Prime x470-Pro Motherboard
GTX 660 (as a test before replacing graphics card with original RX 580)
Sabrent Rocket Q NVMe SSD 1Tb (replacement)
Muskin MKNSSDPE1TB-D6 1TB (original, no longer recognized)
Seasonic Prime Snow 650 W PSU
G.Skill 16GB (2 x 8GB) TridentZ Series DDR4 PC4-25600 3200MHz

Things I have tried:

  • Reseat RAM
  • Memtest86 4 passes each dimm separately in slot A1 and B1 no errors
  • BIOS regression following this tutorial:
    https://www.youtube.com/watch?v=DwJS8-GTgRU
    resulted in “file size does not match current BIOS size” error
  • Moving new SSD to second M.2 slot

Edit* I really would like help in successfully reverting the BIOS to the previous version I was running to see if this fixes the issue. If anyone can help me with that then I would be greatly appreciative.

I was able to solve the problem of reverting the BIOS by using using a USB and incrementally going back to the BIOS version I wanted. The system stability issue seems to be undervoltages to the CPU due to poorly written AGESA code and AIB configuration. Applying an overclock fixed the stability issue ensuring the CPU was given proper voltage.

This will sound strange, but if you would like to try if you are out of options.

Power machine off and unplug your Power supply from the atx cord.
Remove all RAM from the motherboard.
Remove Muskin MKNSSDPE1TB-D6 1TB

Here come the weird parts:

Remove the GPU.
Remove the CPU.

In this order:
Place 1 RAM stick back onto the motherboard
place Muskin MKNSSDPE1TB-D6 1TB back onto motherboard.
place CPU back onto the motherboard, then heatsink.
place Gpu back onto motherboard
plug power supply atx cord back up.

power the machine backup… ( :+1:)

Update with your progress.

Also, if you need to update to latest BIOS use the Asus EZ Flash utility in the BIOS, you don’t need an OS to update.

Is this still physically attached? The SATA bus is notorious for crippling chipsets if you have a bad drive controller.

What happens if you remove the board from the case and just boot from the liveUSB?

Not sure how assembling in this order does anything but to comply I have done it. It initially sat at the BIOS splash screen for a good few minutes and then said “New CPU Installed.” In the American Megatrends hardware screen the system recognized one keyboard, one mouse and no SSD/HDD and prompted if “Press F1 to Continue.” After pressing F1 it boots straight into BIOS.

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It’s a PCIE M.2 SSD. Shouldn’t be tied to the SATA bus afaik. I removed the Muskin before installing the Sabrent drive and installing Manjaro. I have not tried removing the components from the case. I forgot to mention that I moved the new Sabrent OS SSD to the second M.2 slot to see if that may have been the cause.