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Six green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 ECC RDIMM SuperMicro Compatible memory upgrade

SKU CH-FJGX-B3828

Six 128 GB DDR5 4800 CL40 ECC registered DIMMs totalling 768 GB for SuperMicro servers

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from six 128 GB modules
  • DDR5 4800 speed with CL40 latency for responsive server workloads
  • ECC registered design protects data integrity in mission-critical environments
  • 1 V operating voltage reduces power draw under heavy load
  • Validated for SuperMicro SYS-111C-NR, SYS-521C-NR and X13SEDW-F platforms

768GB DDR5 4800 ECC RDIMM kit

This 768GB kit contains six 128GB DDR5 4800 CL40 registered DIMMs built for SuperMicro UP SuperServer SYS-111C-NR and SYS-521C-NR systems. It targets administrators who need maximum registered ECC capacity on the X13SEDW-F platform.

DDR5 4800 registered ECC limits

The modules run at DDR5 4800 (PC5-38400) with a CL40 latency and 1.10V operating voltage. Registered buffering and on-die ECC add command/address parity and single-bit correction, which are mandatory for the qualified SuperMicro servers but increase latency compared to unbuffered memory.

Six-module installation on X13SEDW-F

Populate all six 288-pin slots following the motherboard population guide; the 4Rx4 organisation requires the correct slot order to initialise at 4800 MT/s. Common issues include mixing ranks, skipping the registered DIMM requirement, or using an outdated BIOS that does not recognise the full 768GB capacity.

How it compares

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

Price $24,700.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $32.16 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 numberMR38400-744K6
Total capacity768 GB (6 × 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 items768 GB (6 × 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 decide between a 128 GB module and a smaller capacity for my SuperMicro server?

Each module in this kit is 128 GB, giving 768 GB total across six slots; choose this capacity when your workload needs maximum density per DIMM slot.

What does the 4800 MT/s rating mean for actual throughput in a registered DDR5 system?

At DDR5 4800 the modules deliver PC5-38400 bandwidth, so sustained throughput is capped by that 38 400 MB/s ceiling in a compatible SuperMicro platform.

How does the 288-pin RDIMM interface limit memory speed on the X13SEDW-F motherboard?

The 288-pin registered DDR5 form factor locks the kit to 4800 MT/s on the X13SEDW-F, preventing higher speeds even if the CPU controller supports them.

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