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Green 288-pin DDR5 RDIMM module with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR5 4800 ECC RDIMM CL40 1Rx8 1.1V 288-Pin Lenovo ThinkSystem 4X77A81437 memory upgrade

SKU CH-WQ9E-V1QDY

16GB DDR5 4800 ECC RDIMM module adds registered server memory for compatible Lenovo ThinkSystem platforms

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 16 GB DDR5 4800 MHz for high-throughput server workloads
  • ECC registered design protects data integrity in mission-critical systems
  • CL40 latency at 1.10 V balances speed with power efficiency
  • 1Rx8 288-pin RDIMM fits Lenovo ThinkSystem 4X77A81437 slots
  • Built with major OEM chips and stress-tested for reliability

Lenovo ThinkSystem DDR5 ECC RDIMM

This 16GB DDR5 4800 registered DIMM adds ECC-protected memory to Lenovo ThinkSystem servers built for AMD processors. The single-rank 1Rx8 module targets administrators who need to expand capacity without replacing existing sticks.

Single module with validated compatibility

The package contains one 288-pin RDIMM tested for the 4X77A81437 part number. No cables, brackets or software utilities are included, so the only change after installation is the additional 16GB of error-correcting capacity.

Standard DIMM slot installation

The module seats in any compatible DDR5 RDIMM slot using normal insertion force. Common issues arise when mixing registered and unbuffered memory or when the server BIOS has not been updated to recognise the new capacity.

How it compares

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

Price $467.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $29.25 per GB
Pricier than about 83% 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 numberMR38400-618K1
Total capacity16 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 systemsLenovo
In the box
Included items16 GB (1 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 1Rx8 DDR5 4800 module need any firmware updates or chip replacements during its service life?

No firmware or chip replacements are required; the module is a fixed hardware component validated for the Lenovo ThinkSystem platform.

What limit appears first when the RDIMM runs at 4800 MT/s continuously in a server chassis?

The registered buffer and ECC logic operate within the 1.10 V specification, so thermal limits of the chassis airflow typically appear before any electrical limit of the module.

How much heat and noise does the 16 GB CL40 stick add when the system runs all day?

The module has no heat spreader and draws 1.10 V, so it adds minimal heat and zero acoustic noise; system fan speed determines overall thermal and acoustic profile.

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