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Two green DDR5 RDIMM modules without heat spreaders, 288-pin, 256GB total

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM for THINKMATE GPX-XH20-28S4-8HGX

SKU CH-R5A1-VAP62

256 GB kit of two 128 GB DDR5 4800 CL40 1.1 V ECC registered DIMMs validated for Thinkmate GPX-XH20-28S4-8HGX servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity with two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • CL40 CAS latency at 1.1 V for efficient operation
  • ECC registered 4Rx4 design protects data integrity
  • Validated for ThinkMate GPX-XH20-28S4-8HGX GPU-optimised servers

256GB DDR5 4800 ECC RDIMM Kit

This 256GB kit contains two 128GB DDR5 4800 registered ECC RDIMMs built for the THINKMATE GPX-XH20-28S4-8HGX server platform. It targets administrators who need high-density registered memory with error correction for GPU-optimised workloads. Modules run at 1.1V with CL40 latency and a 4Rx4 organisation.

Installing 288-Pin Registered DIMMs

Installation follows standard 288-pin DDR5 RDIMM procedure; seat each module firmly until the retention clips engage. Common issues include mixing registered and unbuffered DIMMs, populating slots in the wrong sequence for the platform, or failing to update the system BIOS before adding high-capacity 4Rx4 modules.

Verify Slot Count and Population Rules

Before ordering, confirm the server has enough free 288-pin DDR5 slots and check the vendor memory population guide for 4Rx4 DIMM placement order. Ensure the platform supports 128GB per module at 4800 MT/s with registered ECC operation. Mixed-rank or mixed-voltage configurations are not supported by this kit.

How it compares

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

Price $7,228.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.24 per GB
Pricier than about 79% 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 numberMR38400-744K2
Total capacity256 GB (2 × 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 items256 GB (2 × 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 can I confirm the kit is running at the rated 4800 MT/s and CL40 after installation?

Enter the system BIOS or UEFI and check the memory frequency and timing tables; they should show 4800 MT/s with CAS latency 40 at 1.1 V.

What exactly ships in the box and is anything else required to use the modules?

The package contains two 128 GB DDR5 4800 ECC registered RDIMMs — 256 GB total — and no extra cables, brackets or software are needed.

Which version of this kit should I choose for the Thinkmate GPX-XH20-28S4-8HGX server?

Select the 256 GB kit (2 × 128 GB) with part number MR38400-744K2; it matches the server’s DDR5 4800 ECC RDIMM 4Rx4 specification.

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