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Two green DDR5 RDIMM modules with gold contacts and black chips no heat spreader

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR5 4800 CL40 ECC RDIMM Dell PowerEdge XE9640 memory upgrade

SKU CH-YSDA-V0MW0

DDR5 ECC registered server memory kit, 32 GB (2 × 16 GB) at 4800 MT/s CL40, 1.1 V, 288-pin RDIMM for Dell PowerEdge XE9640

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 32 GB capacity scales Dell PowerEdge XE9640 workloads
  • DDR5 4800 speed feeds data-intensive server tasks
  • ECC registered design protects mission-critical data integrity
  • 1 V operation reduces platform power draw
  • 288-pin RDIMM form factor fits XE9640 memory slots

Dell PowerEdge XE9640 memory kit

This 32 GB kit contains two 16 GB DDR5 RDIMM modules built for the Dell PowerEdge XE9640 rack server. Registered ECC operation protects data integrity in mission-critical workloads. The 1Rx8 organisation and 288-pin form factor match the platform's memory slots exactly.

Thermals and power profile

Modules run at 1.1 V with no heat spreader, relying on the server's directed airflow for cooling. Registered buffering reduces electrical load on the memory controller during sustained throughput. CL40 latency at 4800 MT/s delivers predictable response times under heavy multithreaded tasks.

Registered ECC DDR5 at 4800 MT/s

The single specification that decides fit is registered ECC DDR5 rated for 4800 MT/s with CL40 timing. Systems requiring unbuffered UDIMMs, non-ECC modules, or a different speed grade cannot use this kit.

How it compares

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

Price $800.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $25.03 per GB
Pricier than about 70% 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 numberMR38400-618K2
Total capacity32 GB (2 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items32 GB (2 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install these 288-pin DDR5 RDIMMs in the Dell PowerEdge XE9640, and what step is most often missed?

Power down the server, open the chassis, align the notch on each 288-pin module with the slot key, press firmly until the ejector tabs click, then verify in BIOS that both 16 GB modules show at 4800 MT/s with ECC active.

What maintenance or replacement will this 32 GB kit need over its service life?

The modules have no heat spreaders and run at 1.10 V, so only periodic dust removal from the DIMM slots is required; ECC corrects single-bit errors on the fly, and a module is replaced only if the system logs uncorrectable errors.

What limit appears first when the XE9640 runs sustained workloads with this CL40 registered memory?

The registered buffer adds one cycle of latency, so memory-controller throughput saturates before the 4800 MT/s data rate or the 1Rx8 rank organisation becomes the bottleneck.

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