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Twelve green DDR5 RDIMM modules in static bags

NEMIX RAM

NEMIX RAM 1.5TB (12x128GB) DDR5 4800 PC5-38400 4Rx4 CL40 1.1V ECC RDIMM Server Memory Upgrade

SKU CH-13GQ-JNQJX

A 1.5 TB DDR5 registered ECC kit of twelve 128 GB modules running at 4800 MT/s with CL40 latency for compatible Supermicro servers

  • Total capacity1.5 TB (12 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 5 TB total capacity from twelve 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered design detects and corrects data errors
  • Low 1.1 V operation reduces power draw per module
  • Validated for Supermicro GPU SuperServer 821 and 421 series

Capacity and fit

This 1.5 TB kit contains twelve 128 GB DDR5 4800 registered ECC RDIMMs built for Supermicro GPU SuperServer platforms including SYS-821GE-TNHR, SYS-821GV-TNR and SYS-421GE-TNRT. It targets administrators who need maximum registered memory capacity in qualified Supermicro chassis.

Thermals and power

Each module runs at 1.1 V without a heat spreader, relying on the server’s directed airflow for cooling. The registered buffer and ECC logic add minimal latency overhead while keeping power draw predictable under sustained load in dense configurations.

What the kit changes

Populating all twelve slots with 4Rx4 ranks delivers the full 1.5 TB addressable space the platform supports, enabling larger in-memory datasets and higher virtual-machine density. No additional software or accessories are included; the upgrade is purely the matched memory modules.

How it compares

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

Price $47,992.99
Pricier than about 96% of the 21,161 comparable items (median $397.99).
Total capacity 1.5 TB (12 × 128 GB)
Higher than about 97% of the 20,941 comparable items (median 32 GB).
Price per GB $32.00 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K12
Total capacity1.5 TB (12 × 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 systemsSupermicro
In the box
Included items1.5 TB (12 × 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 12 DDR5 RDIMM modules into the Supermicro GPU SuperServer and which step is often missed?

Power down the server, open the chassis, and seat each 288‑pin module firmly until the retention clips click; the step most often missed is confirming the BIOS detects all 1.5TB at DDR5 4800 before closing the case.

What maintenance or replacement will the 12x128GB ECC RDIMM kit need during its service life?

The modules have no heat spreaders and no moving parts, so no scheduled maintenance is required; replacement only occurs if a module fails, which is covered by the lifetime replacement warranty.

What limit appears first when the 4Rx4 registered memory runs sustained workloads at 1.1V?

The CAS latency of CL40 at DDR5 4800 sets the timing boundary; sustained throughput cannot exceed the PC5‑38400 data rate imposed by that latency.

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