Hi everyone,

I’ve been experiencing some issues with my Unraid server recently and I’m hoping for some advice.

The server will occasionally crash and the website becomes unreachable, but Docker containers and VMs appear to still be running. When this happens, a hard reboot usually brings everything back online.

Sometimes after a hard reboot, my cache drives will randomly become unassigned. When this happens, I have to rebuild my Docker containers and VMs.

Today I had another crash, but after rebooting, I was unable to start the array at all. Every attempt to start it caused the server to crash and reboot.

I then ran a memory test and it passed with no errors

After the memory test I rebooted the server and attempted to start the array again

The server crashed once more during this attempt, but after it rebooted again, I was finally able to start the array along with my VMs and Docker containers.

However, I’m now seeing the following error shown below

System details:

• Unraid OS: 6.12.11

• CPU: AMD Ryzen 7 3700X

• RAM: 32GB DDR4

• Motherboard: ASUS ROG Strix B450-F Gaming

I’ve also attached my diagnostics for reference.

If anyone has suggestions on what might be causing this behavior or what I should check next, I’d really appreciate the help. Thanks in advance.

tower-diagnostics-20260104-2121.zip

Make sure this has been taken care of:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-819173

I set Power Supply Idle Control to Typical Current Idle and disabled C-States.

After rebooting into Unraid, the system crashed again when I tried to start the array.

Following the crash, the system automatically rebooted, and the array started successfully. I only had to reassign the cache drives.

I still see the Machine Check Event error, should this be a cause for concern?

43 minutes ago, X0523E said:

Following the crash, the system automatically rebooted,

That suggests a more serious hardware issue, because memtest is only definitive if it finds errors, if you have multiple sticks try using the server with just one, if the same try with a different one, that will basically rule out bad RAM.

I finally got a chance to test the RAM.

I tested each stick individually, and the system still crashed with only one stick installed, regardless of which one I used. I then tried a different RAM kit, but the crashes continued.

After that, I installed an old Ryzen 7 2700X I had lying around, and that resolved the issue. The system now boots without any problems or crashes, confirming that the issue was with the CPU.

Hopes this helps anyone else having a similiar issue.