PowerEdge: R860|R960 "PST0128: No memory found" error displayed during POST with DDR5 96GB DIMMs

Summary: PowerEdge R860 and R960 servers with a Medium Core Count (MCC) CPU with 96GB DIMMs fail to recognize the memory with a critical error at POST.

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Symptoms

PowerEdge R860 and R960 servers configured with an MCC CPU and a 96GB DIMM fail to recognize the memory. A "No memory found" error is displayed. This indicates that the MCC CPU does not support a 96GB DIMM.

No Memory Found Critical error screen
 

Cause

According to Intel’s specifications for 96GB DIMM support, only the Extreme Core Count (XCC) CPU supports this type of DIMM. The MCC CPU does not.

Therefore, for any validation involving a 96GB DIMM, an XCC CPU must be used instead of an MCC CPU.

Resolution

96GB DDR5 RDIMM is supported on R860 and R960 starting from BIOS 1.6.6 version with XCC CPU only. 
https://www.dell.com/support/home/en-id/drivers/driversdetails?driverid=n8w4n&oscode=ws22l&productcode=poweredge-r960

 

Review the following rules:

  • 96GB DIMM is supported with Xeon XCC processors(84xxH), not with MCC processors(64xxH).
  • Only 8 DIMMs or 16 DIMMs per CPU are supported.
  • Update the BIOS to Version 1.6.6 or later.

Ensure that these guidelines are followed for optimal performance.

Affected Products

OEMR R860, OEMR R960, PowerEdge R860, PowerEdge R960
Article Properties
Article Number: 000221528
Article Type: Solution
Last Modified: 06 May 2025
Version:  3
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