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Six green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 ECC RDIMM THINKMATE GPX-XH20-28S4-8HGX memory upgrade

SKU CH-389X-NCYF4

A 768GB DDR5 4800 ECC registered server kit with six 128GB modules at CL40 and 1.1V for Thinkmate GPX-XH20-28S4-8HGX

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768GB total capacity from six 128GB modules for large-scale workloads
  • DDR5 4800 speed with PC5-38400 bandwidth for high-throughput server tasks
  • ECC registered RDIMM design detects and corrects data errors automatically
  • 4Rx4 organisation increases memory density per DIMM slot
  • 10V operating voltage reduces power draw in dense configurations

System-Specific DDR5 Kit for Thinkmate GPX-XH20

This 768GB kit contains six 128GB DDR5-4800 ECC RDIMM modules built for Thinkmate GPX-XH20-28S4-8HGX GPU-optimised servers. Registered 4Rx4 organisation and 1.1V operation match the platform's memory subsystem. IT teams use it to maximise capacity in memory-intensive compute nodes.

Registered ECC with 4Rx4 Organisation

The modules run at PC5-38400 speed with CL40 latency and on-die ECC correction. Registered buffering and 4Rx4 rank density allow the full 768GB to be addressed without exceeding the platform's electrical load limits. Buyers who need unbuffered UDIMMs or lower-density ranks cannot use this kit.

Standard 288-Pin RDIMM Installation

Modules seat in the server's 288-pin DDR5 slots like any RDIMM; no heat spreader is fitted so clearance is minimal. The usual issue is populating all channels in the correct order — the service manual shows the required slot sequence for six modules. Skipping that sequence causes a no-post condition.

How it compares

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

Price $23,400.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $30.47 per GB
Pricier than about 87% 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 numberMR38400-744K6
Total capacity768 GB (6 × 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 items768 GB (6 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What does the DDR5-4800 rating deliver in a real machine?

The kit runs at DDR5-4800, matching the PC5-38400 specification for peak transfer rate when the platform operates at the rated speed.

What does the 288-pin DDR5 RDIMM interface cap in practice?

The 288-pin DDR5 RDIMM interface supports DDR5-4800 operation with ECC and registered signalling, limiting the kit to that speed and protocol on the ThinkMate server.

What does the 6 x 128 GB kit physically need to fit the ThinkMate GPX-XH20-28S4-8HGX?

Six 288-pin DDR5 RDIMM slots, 1.10 V power, and clearance for modules without heat spreaders in the server's memory bays.

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