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Twelve green DDR5 RDIMM modules in a row, no heat spreaders, gold contacts visible

NEMIX RAM

NEMIX RAM 768GB (12x64GB) DDR5 4800 PC5-38400 CL40 2Rx4 ECC RDIMM memory upgrade

SKU CH-XQXZ-6T42V

768 GB DDR5 registered ECC server memory kit with twelve 64 GB modules at 4800 MHz CL40 for Thinkmate GPU-optimised systems

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from twelve 64 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects data errors
  • 2Rx4 dual-rank organisation increases memory density per slot
  • 1 V operating voltage matches DDR5 standard efficiency

Capacity and fit

This 768 GB kit contains twelve 64 GB DDR5 registered DIMMs built for ThinkMate GPX-XH20-28S4-8HGX GPU-optimised servers. IT teams upgrading those platforms receive a matched set that meets the system's ECC and registered requirements.

Thermals and power

Each module operates at 1.10 V with a CL40 latency and no heat spreader. The low voltage helps keep power draw modest while the bare-DIMM design relies on the server's directed airflow for cooling.

Sustained load behaviour

Modules are stress-tested under load before shipping to verify stability during extended compute tasks. Registered signalling and on-die ECC maintain data integrity across all twelve slots during continuous operation.

How it compares

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

Price $18,270.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $23.79 per GB
Pricier than about 68% 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 numberMR38400-924K12
Total capacity768 GB (12 × 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 items768 GB (12 × 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 12 DDR5 RDIMM modules into the ThinkMate server, and which step is most often missed?

Power down the server, open the chassis, locate the 288-pin DDR5 slots, align each module's notch with the slot key, press firmly until both latches click, then verify all 12 modules are fully seated before closing the case — the step most often missed is confirming every latch has engaged on both sides.

What maintenance or replacement will this 768GB ECC registered kit need over its service life?

The modules have no heat spreaders and no moving parts, so routine maintenance is limited to keeping server airflow paths clean; replacement is only required if a module fails ECC correction or the server's memory test reports uncorrectable errors.

What limit appears first when this 4800 CL40 2Rx4 kit runs sustained workloads on the ThinkMate GPU-optimised server?

The primary limit is the DDR5 4800 MT/s bandwidth ceiling combined with CL40 latency; under continuous heavy load the memory controller will hit throughput saturation before thermal throttling becomes a factor at the standard 1.1 V operating voltage.

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