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Green circuit board with black memory chips, gold edge connectors, no heat spreader, 288-pin DDR5 RDIMM form factor

NEMIX RAM

NEMIX RAM 64GB DDR5 4800 ECC RDIMM 2Rx4 CL40 1.1V Dell PowerEdge XR7620

SKU CH-9SXM-AEMHW

A 64 GB DDR5 4800 ECC registered DIMM with CL40 latency, 2Rx4 organisation and 1.1 V operation for Dell PowerEdge XR7620 servers

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB capacity handles large server workloads
  • DDR5 4800 speed delivers high data throughput
  • ECC registered design protects data integrity
  • 1 V operation reduces power consumption
  • Validated for Dell PowerEdge XR7620 rack servers

Capacity and compatibility

This is a 64GB DDR5 ECC RDIMM module built for the Dell PowerEdge XR7620 rack server. It delivers registered, error-correcting memory for workloads that require data integrity and system stability. The single-module design suits upgrades where slot count is limited.

Speed and latency envelope

The module runs at 4800 MT/s with a CAS latency of CL40 and operates at 1.1V. These JEDEC-standard timings define the practical throughput ceiling for the platform; faster data rates or tighter latencies are not supported by this part. Buyers needing higher bandwidth must verify whether the server accepts faster DDR5 SKUs.

Physical build and daily handling

The stick uses a standard 288-pin DDR5 form factor without a heat spreader, relying on server chassis airflow for cooling. Major OEM DRAM chips from Samsung, Micron or Hynix are used. The registered design adds a buffer that increases signal integrity but requires motherboard support for RDIMMs; it will not function in unbuffered DIMM slots.

How it compares

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

Price $1,821.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $28.47 per GB
Pricier than about 80% 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 numberMR38400-924K1
Total capacity64 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 items64 GB (1 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Is the 64 GB module the only capacity offered for this Dell PowerEdge XR7620 compatible DDR5 4800 ECC RDIMM?

The listed package contains a single 64 GB module (1X64GB); other capacities are not described for this part number.

What does the CL40 latency mean for real-world throughput in a Dell PowerEdge XR7620 running DDR5 4800?

CL40 indicates 40 clock cycles of CAS latency at the 4800 MT/s data rate; actual throughput depends on the server's memory controller and workload mix.

The module is a 288-pin DDR5 RDIMM — does that interface cap the speed at 4800 MT/s in the XR7620?

The 288-pin DDR5 RDIMM form factor supports the rated 4800 MT/s; the XR7620's memory controller determines the maximum operating speed.

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