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Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 4800 CL40 2Rx4 ECC RDIMM memory upgrade for THINKMATE GPX-XH20-28S4-8HGX

SKU CH-WSK4-4EM9R

128GB DDR5 4800 ECC registered dual-rank kit for ThinkMate GPU-optimised servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity across two 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for error-correcting server stability
  • 2Rx4 dual-rank organisation with CL40 latency
  • 1 V operation on 288-pin DDR5 form factor

System-specific DDR5 ECC RDIMM kit

This 128 GB kit contains two 64 GB registered DDR5 modules built for the Thinkmate GPX-XH20-28S4-8HGX server. ECC and registered buffering protect data integrity in multi-GPU workloads. The modules run at 1.1 V without heat spreaders, relying on chassis airflow.

Registered 2Rx4 organisation at 4800 MT/s

Each module uses a 2Rx4 layout and operates at DDR5 4800 (PC5-38400) with CL40 latency. Registered signalling reduces electrical load on the memory controller, allowing the full two-module population. This specification determines whether the kit matches the server's qualified vendor list.

Sustained throughput under continuous GPU compute

Stress testing under load verifies stability for extended training or inference runs. Registered buffering and ECC correction maintain signal quality when all channels are saturated. The 1.1 V operating point keeps power draw predictable during prolonged high-bandwidth access.

How it compares

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

Price $3,640.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.45 per GB
Pricier than about 80% 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 numberMR38400-924K2
Total capacity128 GB (2 × 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 items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What does the 4800 MT/s rating mean once these modules are installed in the ThinkMate server?

The server memory controller runs the kit at its rated 4800 MT/s, delivering PC5-38400 bandwidth for GPU-optimised workloads.

How does the DDR5 ECC RDIMM interface limit real-world throughput?

Registered DDR5 with ECC adds one cycle of buffering and error correction, capping sustained throughput at the PC5-38400 line rate.

Will the 288-pin RDIMM modules fit the ThinkMate GPX-XH20-28S4-8HGX memory slots?

Yes, the 288-pin DDR5 RDIMM form factor matches the server's DIMM sockets exactly.

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