PowerEdge: No Mixing of 2800W HLMM 86x220 Ti 54V PSU Manufacturers in XE9680 XE9640 XE8640

Summary: Mixing 2800W (86 × 220 Ti, 54 V) Power Supply Units (PSUs) from different manufacturers in PowerEdge XE9680, XE9640, and XE8640 can cause performance drops.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

Potential Impact of Mixed 2800 W HLMM 86x220 Ti 54 V PSUs.

When PSUs from different manufacturers are mixed in XE9680, XE9640, or XE8640, the following symptoms may be observed:

  • Unexpected degradation of system performance during normal operation.
  • Intermittent or persistent system errors related to power delivery.
  • System throttling or reduced workload capacity.


 

Cause

Invalid PSU Configuration Leading to Performance Degradation

Mixing differing PSU part numbers and firmware versions cause the system’s power‑management logic to misinterpret available power, resulting in unexpected performance drops or errors.

 

CAUTION: Installing mismatched PSU models or firmware versions can cause system instability and performance loss.

Resolution

Recommended PSU Replacement and Firmware Upgrade Procedure

  • Replacement PSU that matches the original manufacturer and model (2800 W HLMM 86x220 Ti 54 V)
  1. Determine if a like‑for‑like replacement is required.
    • If the failed PSU is from AEI or Delta, replace it with the same manufacturer and part number.
    • If the failed PSU is a LiteOn unit, you may mix the older part numbers NCMPF with the newer 9NT8P parts **only after** upgrading the firmware to 00.08.08.

PSU Manufacturer’s Name

DPN1

DPN2

Latest SWBFW Version

AEI

FX9WJ

-

00.0D.12

Delta

1PDR6

-

00.0B.FC

LiteOn

NCMPF

9NT8P

00.08.08

 

NOTE: Dell Part Number (DPN)

Affected Products

PowerEdge XE8640, PowerEdge XE9640, PowerEdge XE9680
Article Properties
Article Number: 000224034
Article Type: Solution
Last Modified: 15 Jan 2026
Version:  5
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