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Eight green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

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

SKU CH-S75G-V4ADM

Eight 16 GB DDR5 registered ECC modules totalling 128 GB at 4800 MT/s CL40 for Supermicro servers

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB total capacity across eight 16GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered RDIMM ensures data integrity
  • 1V operating voltage for efficient power use
  • CL40 CAS latency at 1Rx8 rank configuration

128GB DDR5 4800 ECC RDIMM kit

This 128GB kit contains eight 16GB DDR5 4800 registered DIMMs with ECC and a CAS latency of CL40. It is built for Supermicro servers such as the SSG-521E-E1CR24H, SSG-521E-E1CR24L and X13SEDW-F platforms. The modules run at 1.1V and use 1Rx8 organisation. They are intended for IT professionals who need validated, high-capacity memory for mission-critical workloads.

Sustained-load behaviour

Registered buffering and on-die ECC keep data integrity stable during continuous server operation. The 1.1V operating voltage helps limit thermal output when all eight slots are populated under heavy throughput. Modules are stress-tested under load before shipping to verify reliability in 24/7 environments. The 1Rx8 layout supports consistent bandwidth across multi-channel configurations.

DDR5 4800 interface limits

The DDR5 4800 standard caps transfer rates at PC5-38400, so this kit cannot exceed that bandwidth ceiling. CL40 latency is fixed by the JEDEC base specification for this speed grade. Registered DIMMs add one clock cycle of command delay compared with unbuffered modules. The 288-pin form factor fits only DDR5 RDIMM slots and is not compatible with UDIMM or earlier DDR generations.

How it compares

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

Price $3,294.99
Pricier than about 74% 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 $25.74 per GB
Pricier than about 70% 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

Does the 1.1V DDR5 4800 kit run hotter than standard-voltage modules in a fully populated Supermicro SSG-521E?

The 1.10V operating voltage is the standard DDR5 level, so power draw per module is typical for registered DDR5; with eight 1Rx8 sticks installed the total load is higher, but the Supermicro platform's memory-slot airflow is designed for full populations.

Must the Supermicro X13SEDW-F motherboard already be in place for this 288-pin RDIMM kit to function?

Yes — the modules are 288-pin DDR5 RDIMMs keyed for registered server boards, so a compatible Supermicro motherboard with DDR5 RDIMM slots is required before installation.

Will the CL40 1Rx8 registered DIMMs work alongside older DDR5 4800 ECC modules I keep from another server?

Mixing ranks or CAS latencies can prevent the memory controller from training at 4800 MT/s; for stability, populate all eight slots with this matched 1Rx8 CL40 kit rather than combining it with different modules.

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