PowerEdge: CPU 1 Machine Check Error on 13G with Intel Grantly When Write Data CRC Enabled

Summary: Dell 13th‑gen servers (MLK RTS) on Intel Grantley CRB: enabling BIOS "Write Data CRC" logs CPU 1 Machine Check Error on warm boot; not fully enabled. Fixed in BIOS 2.5.4 Memory Reference Code (MRC) ...

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Symptoms

During Q2FY18 EST testing, EST found "CPU 1 machine check error detected" log as photo [1] occurred in R430 server on every warm boot after changing BIOS setting "Write Data CRC" from default (Disable) to Enable.

  1. This issue could be reproduced in the condition "Dell 13G servers (since MLK RTS) and Intel Grantley CRB."
  2. The feature of "Write Data CRC" was defined from the DDR4 spec and was introduced since Intel’s Broadwell CPU.
  3. The "Write Data CRC" option is in the page of "F2 (System Setup)" -> "System BIOS" -> "System Profile Settings" -> "Custom," the default setting is disabled which dose not causes this issue.
  4. No POST stops responding nor functional impact with this symptom, only "CPU 1 machine check error detected" logged.

[1] 
SLN306171_en_US__1WrCRC MCE error
 

Cause

The root cause is

  1. Function which enable WrCRC is not executed in the WarmBootFast boot path WrCRC has not been enabled completely and cause the issue.
  2. Intel plans to introduce the solution in the next version of MRC. Expect to have the next version of MRC released by end of May (Target in Q3FY18 BIOS).

Resolution

  1. Do not replace any hardware
  2. The root cause is WrCRC function (when enabled) is not executed in the WarmBootFast boot path WrCRC has not been enabled completely and trigger the log.
  3. The fix has been included from BIOS 2.5.4 version.

Affected Products

PowerEdge R230, PowerEdge R330, PowerEdge R430, PowerEdge R530, PowerEdge R530xd, PowerEdge R630, PowerEdge R730, PowerEdge R730xd, PowerEdge R830, PowerEdge R930, PowerEdge T130, PowerEdge T330, PowerEdge T430, PowerEdge T630
Article Properties
Article Number: 000147003
Article Type: Solution
Last Modified: 15 Oct 2025
Version:  5
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