[0x08000800]: an uncorrected error caused a data fabric sync flood event

Jerome69

New Member
Apr 5, 2026
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Hello everybody,

First of all, sorry for my english, I'm French :)

I have a mini forum UM690 Pro (AMD Ryzen 9 6900HX, 32Gb DDR5,AMD Radeon 680M), but since 2 weeks, It reboots many times per day (sometimes 10 per hour).

The first think I did was changing the CPU thermal paste (on the BIOS, the temperature was about 60°, 38° after changing).
But it didn't solved the problem.

I tried to reinstall the lastest proxmox version, changed the kernel version (6.2.16-20) and today I reinstalled the 8.4 Proxmox version.
After 30 minutes, the computer reboots.

I have tested the RAM with Memtest and it passed.
The tests was launched at 9:00PM and at 7:00AM the computer still worked.

On Proxmox, I tried to install the only VM I need to have internet : pfSense. So the CPU is not really stressed.

I have changed the power supply, but maybe it was a cheap one, and it does't resolved my problem.

I tried to disable IOMMU on the grub (I can't do it into the BIOS) and the c-state.

Does someone has encountered this problem, and solved it ?

Thanks in advance.