Hi, yesterday I migrate my main Unraid server to a newer and how i then thinking - safer hardware:

From Erying i7-11800h HM670i ITX CPU/board which works perfectly fine and stable for about 1.5 year to a Asrock H610M-ITX/ac with i5-13500 CPU. It's not my first rodeo with migrating Unraid so whole hardware upgrade went smoothly, rest of components stay's from previous build: 64GB DDR4 3200 Kingston RAM, Intel x520 DA1 10Gb NIC, ASM1166 M.2 to SATA adapter and drives.

I done all sort of stability checking, config checking, etc. and was even finally be able to use SR-IOV intel iGPU to a Windows VM cause my 11800H platform don't support SR-IOV nor GVT-g.

BUT...

After night i try to check how's my server running and I see that my HomeAssistant VM is dead, webGUI report: 500 Internal Server Error, but all docker containers work without any problem (Homarr, CodeServer, GPTWOL, MySpeed etc). When i connect to a local console via KVM i see errors which you can see on screenshots.

I was able to log in but after some time i loose connect even for docker containers and local console.

When restart - standard parity check after unclean reeboot and everything looks fine but I'm afraid the problem may back.

Unraid version is 7.1.4, BIOS was updated and it was last before newest.

Please help me to diagnose and debug my problem guys.

Enable the syslog server and post that after a crash, also good to run memtest.

When I start to set up remote syslog server on other machine I faced second server freeze, this time not in some nightly IDLE state but during parrity chceck after previous unclean shutdown.

Currently I turn Memtest86 and it pass without any problem 2 (almost right now almost 3) times.

On reddit guys point it that turned on XMP profile may be a reason and in fact that I turn on XMP profile for this RAM. I try to turn it off and do further monitoring with remote syslog.

Update:

I turned of XMP profile and set frequency at JEDEC 2400 speed, after that i turn on memtest for 14h, it makes 5 or 6 full cycles without any problem.

I updated BIOS from 12.01 to latest 12.03. After that i see lots of bluetooth errors in syslog console so i turned off wifi/bt device (i see a lots of similar problem on this forum/reddit).

After that Urraid seems to be somewhat stable but in syslog console i can see

Unraid-NAS kernel: mce: [Hardware Error]: Machine check events logged

I attach the mcelog in post.

mcelog.log

2 hours ago, Hastur said:

Unraid-NAS kernel: mce: [Hardware Error]: Machine check events logged

This suggests there's still a hardware problem.

On 10/15/2025 at 3:23 AM, Hastur said:

i5-13500 CPU

There are known stability issues with some Intel 13th and 14th generation CPUs. They have released a couple of BIOS/Microcode fixes to address CPU problems, but, many still experience stability issues with these CPUs. Unfortunately, there is no way to test if you have a bad CPU. RMA has been the only fix for some affected users. I am not saying the CPU is a problem; however, if you rule out other hardware and problems continue, you should consider the CPU.

Edited October 16, 2025Oct 16 by Hoopster

2 hours ago, JorgeB said:

This suggests there's still a hardware problem.

51 minutes ago, Hoopster said:

There are known stability issues with some Intel 13th and 14th generation CPUs. They have released a couple of BIOS/Microcode fixes to address CPU problems, but, many still experience stability issues with these CPUs. Unfortunately, there is no way to test if you have a bad CPU. RMA has been the only fix for some affected users. I am not saying the CPU is a problem; however, if you rule out other hardware and problems continue, you should consider the CPU.

I've probably got the problem: L2 cache on processor. On Windows I've got the same errors in system logs durring the Intel Processor Diagnostic Tool process.

I will try switch the CPU and give an info if this works.

OK, problem solved.

Processor which i bought (used) find out to be broken - L2 cache gets some malfunction.

Seller makes no problem witch replace broken one but don't have spare i5-13500 so them give me a i7-13700... :D

After previous problem I'm still test stability of this processor (after 3 days of extreme test still no problem) I can say only one thing - it's a beast! 24cores with 64GB of ram make my Unraid server almost better than my gaming computer :D