Showing results for 
Search instead for 
Did you mean: 


Journeyman III

5600x crashing every few days, no BSOD just reeboot.

I have been experiencing unexpected crashes once or twice a week since building my system a few months ago. The crashes can occur during gaming or simply watching a youtube video.

Event viewer has this error associated with the crashes:

A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Cache Hierarchy Error
Processor APIC ID: 4

The details view of this entry contains further information.

Event ID: 18


I was wondering if there's an easy fix for this or if this is a defective cpu. Any help would be appreciated, thanks!

3 Replies
Adept I

Hope anyone reply to us, im having the same issue with my 3900XT


This looks like the very common WHEA reboot issue. Symptoms are WHEA errors in Windows event logger, and reboots with a black screen (no bluescreen) at idle or near-idle. Try a beta BIOS with AGESA, there are some indications this helps. I'm up to 2 days stable now with it.

Adept II

Only time I have had this problem

Was when I set my SOC vddg vddp too low