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 MCE randomly, and intermittently, across the cluster.

The PowerEdge servers impacted are:

  • R7525
  • R6525
  • R7515
  • R6515

Cause

Certain CPU instructions are not updated.

Resolution

There are two steps required to address this issue:

  1. BIOS update
    • Upgrade to BIOS 2.19.0
  2. Settings change in the BIOS after the update.
    1. Enter the F2 BIOS.
    2. System BIOS Settings > Processor Settings > enable the setting AMD IC configuration Disable IT Bypass
    3. Save the changes and reboot.

Servers 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: 18 آذار 2026
Version:  3
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