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Twelve bare green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 768GB (12x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-B2RR-34GSK

768 GB of DDR5 ECC registered memory in a 12-module kit rated at 4800 MT/s CL40 for Supermicro servers

  • Capacity768GB (12 x 64GB)
  • SpeedDDR5 4800 (PC5 38400)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V
  • Massive 768 GB capacity via twelve 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered RDIMM ensures data integrity under load
  • Low 1.10 V operation reduces server power draw
  • Validated for Supermicro SYS-121H-TNR SYS-221H-TNR SYS-221H-TN24R

768GB DDR5 ECC RDIMM kit for Supermicro servers

This 12-module kit delivers 768GB of DDR5 4800 registered ECC memory built for Supermicro Hyper SuperServer SYS-121H-TNR, SYS-221H-TNR and SYS-221H-TN24R platforms. Each 64GB module runs at 1.10V with CL40 latency and a 2Rx4 organisation. The registered design adds a buffer that stabilises heavy multi-channel workloads in enterprise environments.

Thermals power and noise in normal operation

Operating at the standard DDR5 voltage of 1.10V, the modules draw minimal power per DIMM and generate low heat without onboard spreaders. Passive cooling relies on chassis airflow directed across the 288-pin slots. Silent operation is inherent because no active cooling is attached to the memory itself.

Build integration and system impact

The kit fills twelve 288-pin DDR5 RDIMM slots and requires a motherboard qualified for registered ECC modules at 4800 MT/s. It is not suited for consumer desktop boards that lack ECC and registered support. Populating all channels maximises bandwidth for virtualisation and database tasks but leaves no free DIMM slots for future expansion.

Highlights

  • Massive 768 GB capacity via twelve 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered RDIMM ensures data integrity under load
  • Low 1.10 V operation reduces server power draw
  • Validated for Supermicro SYS-121H-TNR SYS-221H-TNR SYS-221H-TN24R

Specifications

BrandNEMIX RAM
SeriesSuperMicro Server/Workstation Compatible Series Memory
ModelSuperMicro DDR5 4800MHZ ECC RDIMM Registered Server Memory
Part NumberMR38400-924K12
Capacity768GB (12 x 64GB)
SpeedDDR5 4800 (PC5 38400)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemSupermicro
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 RDIMM
Rank2Rx4
FeaturesDDR5 ECC Registered RDIMM Server Motherboard Compatible
Package Content768GB (12X64GB) DDR5 4800MHZ PC5-38400 2Rx4 1.1V 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 SYS-121H-TNR and which step is often missed?

Power down the server, open the chassis, align each 288-pin module with its slot, press firmly until the ejectors click, then confirm all 12 are detected in BIOS before closing the case.

What maintenance will the 768GB DDR5 ECC registered kit require over its service life?

No routine maintenance is needed; keep the server air filters clean so the 1.1V modules stay cool, and rely on ECC to correct single-bit errors without intervention.

What limit appears first when the 12x64GB DDR5 4800 CL40 kit runs sustained workloads?

The memory controller's maximum supported capacity or thermal throttle point will be reached before the modules themselves hit a hard limit.

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