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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 512GB (8×64GB) DDR5 4800 PC5-38400 CL40 1.1V 2Rx4 288-Pin ECC RDIMM Kit for ThinkMate RAX-XS4-21S4

SKU CH-8KYY-BDBY7

Eight registered DDR5 ECC modules deliver 512 GB at 4800 MT/s with CL40 latency and 1.1 V operation for ThinkMate RAX-XS4-21S4 servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity with eight 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity in servers
  • 1 V operating voltage reduces power draw
  • 288-pin RDIMM form factor fits ThinkMate RAX-XS4-21S4

NEMIX 512GB DDR5 ECC RDIMM kit for ThinkMate

This 512GB kit contains eight 64GB DDR5 4800 registered DIMMs built for the ThinkMate RAX-XS4-21S4 rackmount server. ECC and registered operation provide the data integrity required in mission-critical enterprise workloads. System administrators upgrading compatible ThinkMate platforms can deploy this memory with confidence.

Thermals noise and power at 1.1V DDR5 standard

Operating at the standard 1.1V DDR5 voltage, the modules draw minimal power for high-density server configurations. The absence of heat spreaders relies on chassis airflow for cooling, typical for registered server DIMMs in managed rack environments. No active cooling components are included, so acoustic output depends entirely on the server fan profile.

Eight-module kit enables full 512GB capacity

The package supplies eight matched 64GB RDIMMs (part number MR38400-924K8) so the ThinkMate RAX-XS4-21S4 can reach its supported 512GB maximum in a single installation. No additional software, cables or accessories are bundled; the value is the validated module set that eliminates compatibility guesswork for IT teams.

How it compares

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

Price $13,049.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $25.49 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 lineTHINKMATE Server/Workstation Compatible Series Memory
Model nameTHINKMATE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K8
Total capacity512 GB (8 × 64 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 systemsTHINKMATE
In the box
Included items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in the ThinkMate RAX-XS4-21S4, and which step is often missed?

Power down the server, open the chassis, align each 64 GB module's notch with the DDR5 slot key, press firmly until the ejector clips lock, then enable ECC and registered mode in the BIOS — skipping the BIOS step is the most common oversight.

What maintenance or replacement will the 2Rx4 ECC RDIMM kit need over its service life?

No scheduled maintenance is required; the modules have no heat spreaders and run at 1.1 V, so only a failed stick would need replacement under the lifetime warranty.

What limit appears first when the 512 GB kit runs sustained workloads at 4800 MT/s?

The CL40 latency at 1.10 V is the primary bottleneck; bandwidth caps at PC5-38400 before thermal or power limits are reached.

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