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Eight green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 128GB (8x16GB) DDR5 4800 CL40 ECC RDIMM SuperMicro Server memory upgrade

SKU CH-MJC8-PJEFR

Eight 16 GB DDR5 ECC RDIMM modules at 4800 MT/s with CL40 latency and 1.10 V operation, validated for SuperMicro GPU SuperServer platforms

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity from eight 16 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for server error correction
  • CL40 CAS latency at 1.1 V operating voltage
  • 288-pin 1Rx8 design validated for SuperMicro systems

Capacity and configuration

This NEMIX RAM kit delivers 128GB of DDR5 memory across eight 16GB registered DIMMs. It is built for Supermicro GPU SuperServer systems such as the SYS-821GE-TNHR, SYS-821GV-TNR and SYS-421GE-TNRT that require ECC RDIMM modules.

Suited workloads and limits

The kit fits administrators who need maximum registered ECC capacity in a single Supermicro server chassis. It does not suit builds that use unbuffered UDIMMs, platforms limited to fewer than eight slots, or workloads that demand speeds above DDR5 4800.

Deciding specification

The modules run at DDR5 4800 with a CAS latency of CL40 and a voltage of 1.10V, so the platform must support that exact speed, latency and registered ECC signalling for the kit to operate correctly.

How it compares

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

Price $3,167.99
Pricier than about 73% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $24.75 per GB
Pricier than about 69% 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 numberMR38400-618K8
Total capacity128 GB (8 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (8 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 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 SuperMicro server and which step is often missed?

Power down the server, open the chassis, align each module's notch with the slot key, press firmly until both retention clips click, then verify all eight modules are recognised in the BIOS memory map.

What maintenance or replacement will the 1Rx8 ECC RDIMM kit need over its service life?

No scheduled maintenance is required; ECC corrects single-bit errors on the fly, and modules are replaced only if the server logs uncorrectable errors or a module fails POST.

What limit appears first when the 4800 MT/s CL40 1.1 V kit runs sustained workloads?

The CAS 40 latency at 4800 MT/s sets the throughput ceiling before thermal or voltage limits are reached.

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