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Four green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4×64GB) DDR5 4800 CL40 ECC RDIMM THINKMATE GPX-XH20-28S4-8HGX memory upgrade

SKU CH-GM16-3ZP95

256GB DDR5 ECC RDIMM kit with four 64GB modules at 4800 speed and CL40 latency

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity across four 64GB modules for high-density server workloads
  • DDR5 4800 speed delivers PC5-38400 bandwidth for data-intensive applications
  • ECC registered design with CL40 latency ensures error correction and signal integrity
  • 10V operating voltage reduces power draw in dense GPU-optimised configurations
  • 2Rx4 organisation on 288-pin RDIMM form factor fits ThinkMate GPX-XH20-28S4-8HGX servers

256 GB DDR5 ECC RDIMM kit

This 256 GB kit contains four 64 GB DDR5 4800 registered DIMMs with ECC and a CL40 latency. It operates at 1.1 V and uses a 288-pin form factor. The modules are validated for ThinkMate GPX-XH20-28S4-8HGX GPU-optimised servers.

Suited for ThinkMate server upgrades

IT teams expanding memory in the specified ThinkMate platform will find the correct speed, rank and voltage pre-matched. Systems that require unbuffered UDIMMs, a different pin count or non-ECC memory cannot use this registered kit.

2Rx4 dual-rank organisation

Each 64 GB module is built as 2Rx4, doubling the banks per DIMM compared to single-rank parts. This rank structure determines maximum capacity per channel on the target platform and must match the server memory population rules.

How it compares

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

Price $6,500.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $25.39 per GB
Pricier than about 70% 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 numberMR38400-924K4
Total capacity256 GB (4 × 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 items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 288-pin DDR5 RDIMM form factor fit the memory slots on the Thinkmate GPX-XH20-28S4-8HGX server?

Yes, each 64 GB module uses the standard 288-pin DDR5 RDIMM layout required by that platform.

What is the correct order for populating the four 64 GB modules during installation?

Follow the server manual’s channel sequence; the kit is a matched 4×64 GB set so all slots should be filled identically.

Will the ECC registered modules need firmware updates or battery replacements over their service life?

No, DDR5 ECC RDIMMs operate without onboard firmware or batteries; they remain functional until physical replacement.

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