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Two green DDR5 RDIMM sticks, black chips, no heat spreader

NEMIX RAM

NEMIX RAM CSE-GS7A-2000B 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-V0BC-E9W5X MPN CSE-GS7A-2000B

256 GB kit of two 128 GB DDR5 4800 CL40 ECC registered DIMMs for Supermicro SuperWorkstation SYS-551A-T

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 10 V operation reduces power draw
  • Validated for Supermicro SYS-551A-T workstation compatibility

SuperMicro DDR5 4800 ECC RDIMM Kit

This NEMIX RAM memory kit provides 256GB of DDR5 4800 registered ECC memory in a matched pair of 128GB modules. It is built for SuperMicro SuperWorkstation SYS-551A-T and Super X13SWA-TF systems that require registered DIMMs. The modules operate at 1.1V with a CAS latency of CL40 and use a 4Rx4 organisation. They are validated for stability in demanding server and workstation workloads.

Suited for registered DDR5 platforms needing high

This kit suits IT professionals upgrading compatible SuperMicro workstations or servers where registered ECC memory is mandatory. Builders using consumer motherboards, laptops, or any platform that accepts only unbuffered non-ECC UDIMMs cannot use these modules. Systems limited to lower maximum capacities or different pin counts should look elsewhere.

Registered ECC with 4Rx4 organisation at 4800 MT/s

The decisive specification is the registered ECC RDIMM format combined with a 4Rx4 rank structure running at DDR5 4800. Only motherboards explicitly qualified for registered DDR5 ECC memory with this rank configuration will support the kit. Verify the system memory qualification list before purchase.

How it compares

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

Price $8,249.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $32.23 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 numberMR38400-744K2
Total capacity256 GB (2 × 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 items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the memory slots on the Supermicro SuperWorkstation SYS-551A-T?

Yes, these 288-pin DDR5 RDIMM modules are built to the standard DDR5 form factor required by the Supermicro SuperWorkstation SYS-551A-T.

What is the correct installation sequence for the two 128GB modules in the Supermicro X13SWA-TF motherboard?

Install each 128GB module into the designated DDR5 slots following the motherboard manual's population order; the registered design requires full seating until the retention clips lock.

How often should the 256GB DDR5 4800 ECC RDIMM kit be replaced in a continuously running server?

DDR5 ECC RDIMM modules have no scheduled replacement interval; they remain in service until a memory test reports correctable or uncorrectable errors.

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