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Journeyman III

System constant rebooting / WHEA Logger Event ID 18

Computer Type: Desktop

GPU: Radeon RX 6600 XT - Sapphire

CPU: Ryzen 7 5800X

Motherboard: ASUS TUF B450M-PRO Gaming 

RAM: GSkill Ripjaws 8GB X2 DDR4-3200 (16GB in total)


Operating System & Version: Windows 11 Pro

GPU Drivers: Radeon Software (Adrenaline) 22.3.1

Chipset Drivers: AMD Chipset Software

Hard Disk: SSD - Samsung SSD 840 EVO 250 GB ( Windows installed on this one ) / Kingston SSD 1TB 

Description of Original Problem: My PC keeps on restarting randomly. I had a Ryzen 5 3600 and replaced with this new one, was good for a couple of days ( i thought it was solved) but the crashes come again. It happens mostly when i am working on Photoshop. Every time it restarts, the event logger logs the below error:

"A fatal hardware error has occurred.

Reported by component: Processor Core Error Source: Machine Check Exception Error Type: Cache Hierarchy Error Processor APIC ID: 11

The details view of this entry contains further information."

Troubleshooting: I have updated all the drivers, windows and BIOS. Deleted and reinstalled and updated all the drivers. Checked if the CPU fan is properly attached to the CPU, if GPU is properly attached, if RAMs are properly attached, and everything else. All of them seem perfectly fitted. Used various software to test CPU, GPU, RAM, etc. All came back with good results. Did memory test and DISM test. Both were successful without any error.

3 Replies
Adept I

Try to disable c-state control 

Adept III


Disable PBO or return it (RMA)

It is a known AMD zen3 design flaw issue. 

Take a look:

Ryzen 5000 Crashes (WHEA Errors) will get a "Silen... - AMD Community



I literally have the same problem eventhough i already bought a new kit of ram And i rmad my 5600x got the money back bought a 5700x and it still happens i kinda lost hope on AMD