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Eight green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (8x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade for Dell PowerEdge XE9640

SKU CH-6AT9-ST3BT

256 GB DDR5 4800 CL40 ECC registered kit of eight 32 GB modules for Dell PowerEdge XE9640

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity with eight 32GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 1V operating voltage for efficient server operation
  • Validated compatibility with Dell PowerEdge XE9640

Dell PowerEdge XE9640 memory kit

This 256 GB kit contains eight 32 GB DDR5 4800 RDIMM modules built for the Dell PowerEdge XE9640 rack server. Each module is ECC registered with a CL40 latency and runs at 1.1 V. The kit is designed for IT teams upgrading that specific platform.

Capacity and headroom

Eight 32 GB sticks deliver 256 GB of registered ECC memory at DDR5 4800 speed. The 2Rx8 organisation and CL40 timing suit heavy virtualisation and database workloads. The kit fills eight DIMM slots and reaches the platform limit for this configuration.

Build integration

Modules use the standard 288-pin DDR5 RDIMM form factor and operate at 1.1 V. No heat spreaders are fitted so airflow in the Dell chassis is unrestricted. Installation follows the server's documented memory population rules for registered DIMMs.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $7,722.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $30.17 per GB
Pricier than about 86% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-328K8
Total capacity256 GB (8 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (8 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the eight 32 GB DDR5 4800 CL40 ECC RDIMMs work alongside other DDR5 modules already installed in the PowerEdge XE9640?

The kit provides 256 GB in eight 2Rx8 registered DIMMs at 1.1 V; mixing ranks or speeds can prevent the server from posting, so populate all slots with identical modules for guaranteed operation.

How can I verify the 256 GB kit is running at the rated 4800 MT/s and CL40 after installation?

Enter the system BIOS or iDRAC interface and confirm the memory speed reads 4800 MT/s with CAS latency 40; the modules are stress-tested before shipping to meet those timings.

What exactly ships in the box and what must be sourced separately for the PowerEdge XE9640 upgrade?

The package contains the eight 32 GB DDR5 4800 ECC RDIMMs only; no heat spreaders, tools or additional cables are included or required for installation.

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