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Two green DDR5 RDIMM modules with gold contacts and black chips

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 CL40 ECC RDIMM Dell XE8640 memory upgrade

SKU CH-VZCZ-VZERV

64GB dual-rank DDR5 ECC RDIMM kit running at 4800MHz CL40 for Dell PowerEdge XE8640 servers

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB kit expands server capacity for heavy workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive tasks
  • ECC registered design protects data integrity in mission-critical systems
  • 1 V operation reduces power draw per module
  • Validated for Dell PowerEdge XE8640 rack servers

Dell PowerEdge XE8640 memory kit

This 64GB kit contains two 32GB DDR5 RDIMMs built for the Dell PowerEdge XE8640 rack server. Registered ECC operation protects data integrity in multi-socket configurations. Modules run at 1.1V with a CL40 latency profile. The kit targets administrators expanding memory capacity on qualified Dell platforms.

Sustained workload behaviour

Registered buffering and on-die ECC maintain signal quality during continuous read-write cycles typical of virtualization and database tasks. The 4800 MT/s data rate delivers steady throughput without relying on short burst speeds. Dual-rank 2Rx8 organisation supports higher density per channel under prolonged load.

CL40 latency at DDR5 4800

The CAS latency of CL40 at 4800 MT/s determines how quickly the memory controller can access each column. This timing is fixed by the module SPD and cannot be tightened without platform support. Buyers needing lower latency must verify motherboard compatibility before purchase.

How it compares

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

Price $1,633.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $25.53 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 numberMR38400-328K2
Total capacity64 GB (2 × 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 items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How much power does the 1.1 V DDR5 4800 RDIMM kit draw under sustained load?

Each module runs at 1.10 V; total draw depends on the Dell PowerEdge XE8640 memory controller and workload, not on the kit alone.

What must the Dell PowerEdge XE8640 already have to accept this 288-pin ECC registered kit?

The server needs free DDR5 RDIMM slots that support 2Rx8 organisation and PC5-38400 speed; the kit itself is a direct plug-in upgrade.

Will the CL40 2Rx8 modules run at 4800 MT/s if the system currently uses slower DDR5 RDIMMs?

All installed DDR5 RDIMMs operate at the lowest common speed; the kit will downclock to match the existing modules.

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