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Two green DDR5 RDIMM modules with black chips and gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 ECC RDIMM CL40 1.1V ThinkMate GPU Server memory upgrade

SKU CH-AQNT-68MGN

A 256 GB DDR5 registered ECC kit of two 128 GB modules running at 4800 MT/s with CL40 latency for ThinkMate GPU-optimised 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 from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered RDIMM design protects data integrity
  • 1 V operation reduces power draw per module
  • 288-pin 4Rx4 layout matches ThinkMate GPU server slots

Server memory for ThinkMate GPU systems

This 256 GB kit contains two 128 GB DDR5 ECC RDIMM modules built for ThinkMate GPX-QH24-24E4-8GPU and GPX-QH14-28E4-8HGX servers. Registered buffering and on-die error correction protect data integrity in GPU-dense workloads. The kit targets administrators expanding memory capacity in these qualified platforms.

Thermals and power

Modules operate at 1.1 V without heat spreaders, relying on chassis airflow for cooling. DDR5 architecture moves the power-management IC onto each DIMM, reducing rail current compared with previous generations. Registered clock drivers add negligible latency while stabilising signal integrity across 288 pins.

Deciding specification

Capacity is fixed at 256 GB in a two-module 4Rx4 configuration running at 4800 MT/s with CL40 timing. Servers needing different densities, speeds or rank layouts cannot use this kit. Verify slot count and maximum supported capacity before ordering.

How it compares

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

Price $7,769.99
Pricier than about 84% 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 $30.35 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 numberMR38400-744K2
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 do I install the 288-pin DDR5 RDIMM modules in my ThinkMate GPU server and which step is often missed?

Power down the server, open the chassis, align each 288-pin module with the DDR5 slot key notch, press firmly until both retention clips click, then verify in BIOS that all 256GB are detected at 4800 MT/s; the step most often missed is seating both clips fully on each 128GB stick.

What maintenance or replacement will this ECC registered memory need over its service life?

The modules have no heat spreaders and require no scheduled maintenance; ECC corrects single-bit errors on the fly, but if a 4Rx4 rank develops uncorrectable errors the only remedy is replacing the affected 128GB module under the lifetime replacement guarantee.

What limit appears first when the kit runs sustained workloads at 4800 MT/s?

The primary limit is the CL40 latency at 1.10V; sustained heavy traffic will hit the timing budget before thermal throttling becomes an issue because the registered design and low voltage keep module temperatures within spec.

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