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Four green DDR5 RDIMM sticks, bare chips, 288-pin, 128GB kit

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR5 4800 CL40 2Rx8 ECC RDIMM Dell PowerEdge XE8640

SKU CH-JPNW-0WG9T

128 GB of DDR5-4800 ECC registered memory in four 32 GB modules with CL40 latency for Dell PowerEdge XE8640 servers

  • 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 from four 32 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered RDIMM design protects data integrity
  • 10 V operation reduces power draw
  • Validated for Dell PowerEdge XE8640 rack server

128 GB DDR5 4800 ECC RDIMM kit

This 128 GB kit contains four 32 GB DDR5 4800 ECC registered DIMMs built for the Dell PowerEdge XE8640 rack server. Each module runs at 1.1 V with a CAS latency of CL40 and uses a 2Rx8 organisation. The registered design adds a buffer that reduces electrical load on the server memory controller.

DDR5 4800 bandwidth and registered topology

The DDR5 4800 interface provides a peak transfer rate of PC5-38400 while the registered architecture limits the number of ranks the memory controller must drive directly. This topology supports high-density population but does not allow mixing with unbuffered or non-ECC modules in the same system.

288-pin RDIMM form factor decides fit

Only systems that accept 288-pin DDR5 RDIMMs with ECC and registered signalling can use this kit. Desktop boards, laptops or workstations requiring UDIMM or SO-DIMM formats cannot install these modules.

How it compares

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

Price $3,373.99
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 $26.36 per GB
Pricier than about 73% 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

Should I choose the 128 GB kit of four 32 GB modules or a different capacity for my Dell PowerEdge XE8640?

This kit provides 128 GB total across four 32 GB RDIMMs, matching the XE8640's supported DDR5 4800 registered ECC configuration.

What does the DDR5 4800 speed rating deliver once the modules are installed in the server?

The modules run at 4800 MT/s with CL40 latency at 1.10 V, providing the rated PC5-38400 bandwidth for registered ECC workloads.

How does the 288-pin DDR5 RDIMM interface affect compatibility and performance limits?

The 288-pin registered DIMM format fits the XE8640's DDR5 RDIMM slots, operates at 1.10 V with on-die ECC, and is capped at the platform's 4800 MT/s maximum.

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