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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 512GB (8x64GB) DDR5 4800 CL40 2Rx4 ECC RDIMM Dell PowerEdge XE9640 memory upgrade

SKU CH-RE7H-4EN72

Eight 64 GB DDR5 4800 CL40 ECC registered DIMMs totalling 512 GB for Dell PowerEdge XE9640 servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity scales memory-intensive workloads
  • DDR5 4800 speed transfers data at PC5-38400 bandwidth
  • ECC registered design corrects errors for mission-critical stability
  • 2Rx4 288-pin RDIMM modules install in Dell PowerEdge XE9640
  • 1 V operation reduces power draw per module

System-specific memory kit for Dell PowerEdge XE9640

This 512 GB kit contains eight 64 GB DDR5 RDIMMs rated at 4800 MT/s with CL40 latency. Each module is registered, ECC-enabled and organised as 2Rx4 for server workloads. The kit targets IT teams upgrading compatible Dell rack servers.

Compatibility check for Dell PowerEdge XE9640

Verify that your XE9640 supports 512 GB of registered ECC DDR5 at 1.1 V and that all eight DIMM slots are available. Confirm the system BIOS recognises 2Rx4 modules and that the memory configuration follows Dell population rules.

Build quality and daily implications

Modules use major OEM DRAM from Samsung, Micron or Hynix and are stress-tested under load before shipment. The 288-pin RDIMM form factor fits standard DDR5 server slots without a heat spreader, leaving clearance for dense rack airflow. Registered buffering and ECC protect data integrity in continuous operation.

How it compares

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

Price $14,337.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $28.00 per GB
Pricier than about 78% 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 numberMR38400-924K8
Total capacity512 GB (8 × 64 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 rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the kit ship with eight 64 GB modules, or do I need to buy any sticks separately?

The kit contains eight 64 GB DDR5 RDIMMs, giving a total of 512 GB; no additional modules are required.

Should I pick the 2Rx4 CL40 version or a different rank and latency for the PowerEdge XE9640?

This 2Rx4 CL40 kit matches the Dell-qualified specification for the XE9640, so it is the correct choice for that server.

What does the 4800 MT/s rating mean once the memory is installed in the XE9640?

The modules run at 4800 MT/s (PC5-38400) with CL40 latency at 1.1 V, delivering the rated bandwidth and error-correction the platform expects.

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