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Green 288-pin DDR5 RDIMM module, no heat spreader, 32GB capacity

NEMIX RAM

NEMIX RAM 32GB DDR5 4800 CL40 1Rx4 ECC RDIMM Lenovo ThinkSystem 4X77A77030 memory upgrade

SKU CH-2XY1-79RPJ

Adds 32 GB DDR5-4800 ECC registered memory for Lenovo ThinkSystem servers

  • Total capacity32 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 32 GB capacity expands server memory headroom for large workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects errors to protect data integrity
  • 1 V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem 4X77A77030 ensuring plug-in compatibility

Capacity and fit

This 32 GB DDR5 registered DIMM is built for Lenovo ThinkSystem servers that require the 4X77A77030 part number. It suits IT teams expanding memory capacity on Intel-based platforms where ECC and registered signalling are mandatory.

Thermals and power

The module runs at 1.10 V without a heat spreader, relying on server chassis airflow for cooling. Standard DDR5 power management keeps draw low during typical workloads, and the registered buffer adds minimal latency while maintaining signal integrity.

Upgrade context

It replaces a single lower-capacity RDIMM or fills an empty slot when the platform supports 1Rx4 organisation at 4800 MT/s. The jump is worthwhile when the workload demands ECC protection and the system memory controller is qualified for PC5-38400 speeds.

How it compares

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

Price $830.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $25.97 per GB
Pricier than about 71% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-314K1
Total capacity32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items32 GB (1 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How do I install this 288-pin DDR5 RDIMM in a Lenovo ThinkSystem server and what step is often missed?

Power down the server, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until the ejector tabs click, then confirm in BIOS that the 32GB module is recognised at 4800MHz with ECC enabled.

What maintenance or replacement will this ECC RDIMM need over its service life?

The module has no moving parts and no heat spreader; it requires no scheduled maintenance, and ECC corrects single-bit errors on the fly — replacement is only needed if a multi-bit failure occurs or capacity must be increased.

What limit appears first when this 1Rx4 CL40 module runs sustained workloads?

The CAS latency of CL40 at 4800MHz sets the baseline response time; under continuous load the memory controller will hit that latency ceiling before bandwidth or voltage (1.10V) becomes a bottleneck.

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