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Four green 288-pin DDR5 RDIMM modules, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR5 4800 CL40 1.1V ECC RDIMM memory upgrade

SKU CH-S1R4-PBC8T

128 GB DDR5 server kit with four 32 GB registered ECC modules at 4800 MT/s, CL40 and 1.1 V for Dell PowerEdge XE9640

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400
  • CL40 CAS latency at 1.1 V operating voltage
  • ECC registered RDIMM with 2Rx8 organisation for server reliability
  • Validated for Dell PowerEdge XE9640 rack server compatibility

Dell PowerEdge XE9640 Memory Kit

This 128GB kit contains four 32GB DDR5 4800 registered ECC RDIMMs built for the Dell PowerEdge XE9640 rack server. Each module runs at 1.1V with CL40 latency and a 2Rx8 organisation. The 288-pin form factor matches the server's memory slots exactly.

Suited for capacity upgrades on the named Dell

Administrators expanding memory in a Dell PowerEdge XE9640 will find the correct speed, voltage and registration here. Buyers who need unbuffered UDIMMs, non-ECC modules or a different pin count should look elsewhere because this kit is registered ECC RDIMM only.

Registered ECC RDIMM with 2Rx8 organisation

The registered buffer and on-die ECC protect data integrity under sustained server workloads. The 2Rx8 rank structure determines how the memory controller addresses each 32GB module. Confirm the platform requires registered ECC RDIMMs before purchasing.

How it compares

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

Price $3,422.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $26.74 per GB
Pricier than about 74% 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 numberMR38400-328K4
Total capacity128 GB (4 × 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 items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 288-pin DDR5 RDIMM form factor fit the Dell PowerEdge XE9640 memory slots?

Yes, the 288-pin DDR5 RDIMM modules are the correct physical format for the Dell PowerEdge XE9640 server.

What is the correct population order for the four 32 GB modules in the Dell PowerEdge XE9640?

Install the 2Rx8 RDIMMs in the slot sequence specified by the Dell PowerEdge XE9640 service manual to ensure proper channel balancing.

Will the ECC registered RDIMM modules require firmware updates or battery replacements over time?

No, the DDR5 ECC RDIMMs have no onboard battery or firmware; they operate passively once seated in the server.

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