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Sixteen bare green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (16x16GB) DDR5 4800 CL40 1.1V ECC RDIMM 288-pin SuperMicro memory upgrade

SKU CH-G9SY-C243X

256 GB DDR5 kit with 16 registered ECC modules at 4800 MT/s, CL40 and 1.1 V for Supermicro FatTwin SuperServer SYS-F521E3-RTB and SYS-F511E2-RT

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across sixteen 16 GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered RDIMM for data integrity in servers
  • 1 V operating voltage for efficient power use
  • Qualified for SuperMicro FatTwin SYS-F521E3-RTB and SYS-F511E2-RT systems

256GB DDR5 ECC RDIMM kit

This 256GB kit contains sixteen 16GB DDR5 4800 registered DIMMs with ECC and CL40 latency. It is built for SuperMicro FatTwin SuperServer SYS-F521E3-RTB and SYS-F511E2-RT platforms that require registered memory. System administrators expanding mission-critical server capacity use this configuration.

Registered DDR5 for SuperMicro servers

Each module operates at 1.1V and uses a 1Rx8 organisation on a 288-pin DDR5 RDIMM form factor. The registered buffer reduces electrical load on the memory controller, allowing all sixteen slots to be populated without signal degradation. No heat spreaders are fitted, so airflow in dense chassis remains unobstructed.

Sixteen modules at 4800 MT/s

The kit delivers 256GB total capacity at PC5-38400 speed, suitable for virtualisation hosts and large in-memory databases. CL40 latency and single-rank density provide stable throughput for sustained workloads. Systems needing higher frequencies or lower latencies will require different module specifications.

How it compares

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

Price $6,848.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $26.75 per GB
Pricier than about 74% 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 numberMR38400-618K16
Total capacity256 GB (16 × 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 items256 GB (16 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 4800 MT/s speed hold under continuous server workloads?

The kit runs at DDR5 4800 (PC5-38400) with CL40 timings and 1.10 V; registered ECC modules maintain that data rate as long as the motherboard keeps the memory controller within spec.

How much heat and power do sixteen 1Rx8 modules produce in a 2U chassis all day?

Each 16 GB RDIMM operates at 1.1 V without a heat spreader; total power scales with the 256 GB capacity, so airflow across the 288-pin slots must handle the combined thermal load of all sixteen sticks.

Which SuperMicro FatTwin or SuperServer models are validated for this 256 GB kit?

The part number MR38400-618K16 is listed for FatTwin SYS-F521E3-RTB and SuperServer SYS-F511E2-RT; the motherboard must provide sixteen DDR5 RDIMM slots and support 1Rx8 registered ECC at 4800 MT/s.

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