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Six bare green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM CSE-GS7A-2000B 768GB (6×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-ST8J-SDVNM MPN CSE-GS7A-2000B

Six 128 GB DDR5 4800 CL40 ECC registered DIMMs totalling 768 GB for Supermicro SYS-551A-T workstations

  • 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 rated at PC5-38400 bandwidth
  • ECC registered RDIMM design protects data integrity
  • 1 V operating voltage reduces power draw
  • Validated for Supermicro SYS-551A-T workstation compatibility

Capacity and Target System

This 768GB kit consists of six 128GB DDR5 RDIMM modules built for the SuperMicro SuperWorkstation SYS-551A-T. It delivers registered ECC memory for workloads that require data integrity and high capacity in a single compatible package.

DDR5 4800 Registered ECC Limits

The modules run at 4800 MT/s with CL40 latency at 1.1V. Registered buffering and 4Rx4 organisation add command-cycle overhead that the memory controller must support. Systems not qualified for registered DDR5 ECC will not boot with this kit.

Upgrade Path and When It Applies

This kit replaces lower-capacity registered DDR5 ECC RDIMMs in the qualified SuperMicro platform. The jump is worthwhile when virtualisation, large-dataset analytics or in-memory databases exceed the current memory ceiling and the motherboard populates all six slots.

How it compares

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

Price $22,915.99
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 $29.84 per GB
Pricier than about 85% 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

Is the 768GB kit the only capacity available for this DDR5 4800 CL40 ECC RDIMM?

The CSE-GS7A-2000B kit provides 768GB across six 128GB modules running at DDR5 4800 with CL40 latency.

What does the 4800 speed rating mean when the kit is installed in a Supermicro SuperWorkstation SYS-551A-T?

The modules operate at DDR5 4800 (PC5-38400) with 1.10V voltage and registered buffering for stable server workloads.

How does the 288-pin DDR5 RDIMM interface limit the maximum memory bandwidth in this system?

The 288-pin DDR5 RDIMM form factor carries the 4800 MT/s signal; registered buffering and ECC maintain data integrity at that rate.

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