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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 CL40 ECC RDIMM THINKMATE RAX-XS4-21S4 memory upgrade

SKU CH-PCXX-A29VM

A 64GB kit of four 16GB DDR5 4800 CL40 ECC registered DIMMs for the ThinkMate RAX-XS4-21S4 server

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity in a matched 4 × 16 GB kit
  • DDR5 4800 MT/s speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design protects data integrity in servers
  • Low 1.10 V operating voltage reduces power draw
  • Validated for ThinkMate RAX-XS4-21S4 rackmount compatibility

System-Specific DDR5 Server Memory

This NEMIX RAM kit provides 64 GB of DDR5 4800 ECC registered memory in four 16 GB modules. It is built for the Thinkmate RAX-XS4-21S4 rackmount server and uses 288-pin RDIMM form factor. The modules run at 1.10 V with CL40 latency and 1Rx8 organisation. Major-brand Samsung, Micron or Hynix DRAM ensures enterprise-grade reliability.

IT Teams Maintaining Qualified Platforms

The kit suits administrators who need a validated, drop-in upgrade for the specified Thinkmate server. It is not for builders assembling custom white-box servers, desktop workstations or consumer PCs that require unbuffered DIMMs. Buyers needing higher frequencies, lower latencies or larger per-module densities should evaluate other qualified options.

Registered ECC RDIMM Architecture

The registered ECC design adds a register between the DRAM and the memory controller, reducing electrical load and enabling the four-module population supported by the target platform. Non-registered or non-ECC modules will not function in this server. Verify the RAX-XS4-21S4 memory population rules before ordering.

How it compares

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

Price $1,686.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $26.36 per GB
Pricier than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineTHINKMATE Server/Workstation Compatible Series Memory
Model nameTHINKMATE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-618K4
Total capacity64 GB (4 × 16 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 systemsTHINKMATE
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What does the 4800 MT/s speed mean for real-world server workloads?

The DDR5 4800 modules deliver PC5-38400 bandwidth, letting the ThinkMate RAX-XS4-21S4 move larger data sets per clock cycle than slower DDR5, which helps multi-threaded applications and virtualization hosts.

How does the 288-pin RDIMM interface limit the maximum memory the system can address?

Each 1Rx8 registered DIMM presents a single rank to the memory controller, so the four-module kit populates four channels without exceeding the platform’s rank-per-channel limit.

What physical clearance is needed to install these 288-pin modules in the rackmount chassis?

The bare modules have no heat spreader, so they fit standard DDR5 RDIMM slots even when adjacent cards or airflow shrouds leave only the JEDEC minimum vertical space.

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