PowerEdge: AMD Milan Processors reboot with Machine Check Exceptions

Summary: In a clustered Hypervisor environment, Dell PowerEdge with AMD Processors intermittently reboot reporting Machine Check Exceptions (MCE)

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Symptoms

In rare cases, PowerEdge Servers in a Hypervisor cluster using AMD Milan CPUs (7xx3), may exhibit MCEs randomly, and intermittently, across the cluster.

The PowerEdge systems impacted are:

  • R7525
  • R6525
  • R7515
  • R6515

 

Cause

Certain CPU instructions are not updated.

Resolution

There are two steps required to address this.

 

  1. BIOS update
    • Upgrade to BIOS 2.19.0, planned for release in July 2025

 

  1. Settings change in the BIOS after the update.
    • Enter the F2 BIOS.
    • Under System BIOS Settings > Processor Settings, enable the setting "AMD IC Config Disable IT Bypass"
    • Save the changes and reboot.

 

Systems with this BIOS setting change may show a slight performance decrease of around 0.5% to 1% in typical virtualized environments.  

 

Affected Products

PowerEdge R6515, PowerEdge R6525, PowerEdge R7515, PowerEdge R7525
Article Properties
Article Number: 000304911
Article Type: Solution
Last Modified: 09 May 2025
Version:  2
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