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Four green DDR5 RDIMM modules without heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM THINKMATE DDR5 4800 512GB (4x128GB) CL40 1.1V 4Rx4 RDIMM memory upgrade

SKU CH-062F-B2HVW

512 GB DDR5 ECC registered server memory kit with four 128 GB modules at 4800 MHz CL40 1.1 V for Thinkmate systems

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered design protects data integrity
  • Low 1.10 V operating voltage reduces power draw
  • Validated for ThinkMate GPX-XH8-22S4-8GPU server

ThinkMate DDR5 4800 ECC RDIMM kit

This 512 GB kit contains four 128 GB DDR5 4800 registered DIMMs built for the ThinkMate GPX-XH8-22S4-8GPU server. ECC and 4Rx4 organisation protect data integrity in GPU-optimised workloads. It targets administrators scaling memory for AI training, rendering or virtualisation clusters.

Thermals and power at 1.1 V

Modules run at 1.10 V with no heat spreader, relying on chassis airflow for cooling. Registered buffering reduces electrical load on the memory controller during sustained throughput. The CL40 latency and PC5-38400 rating reflect standard JEDEC operation without overclocking headroom.

Build integration and capacity gains

Four 288-pin slots are required to install the full kit, freeing remaining DIMM sockets for future expansion. Registered signalling allows higher module counts per channel than unbuffered alternatives. Buyers needing non-ECC consumer memory or lower-density sticks should look elsewhere.

How it compares

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

Price $16,018.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $31.29 per GB
Pricier than about 90% 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 numberMR38400-744K4
Total capacity512 GB (4 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsTHINKMATE
In the box
Included items512 GB (4 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install four 288-pin DDR5 RDIMM modules into the ThinkMate GPX-XH8-22S4-8GPU server, and which step is most often missed?

Power down the server, open the chassis, align each module's notch with the slot key, press firmly until the ejector tabs click, then verify all 512 GB are recognised in BIOS before closing the case; the step most often missed is confirming the BIOS sees the full capacity.

What maintenance or replacement will this 4Rx4 registered ECC kit need over its service life?

No routine maintenance is required; the modules are covered by a lifetime replacement warranty, so a failed stick is swapped for a new one rather than repaired.

At what point does the CL40 latency at 4800 MT/s become the limiting factor under sustained workloads?

The CL40 timing at 4800 MT/s is the first latency ceiling you hit during sustained memory-bound workloads, before bandwidth or thermal limits appear.

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