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Four green 288-pin DDR5 RDIMM modules in antistatic tray

NEMIX RAM

NEMIX RAM CSE-GS7A-2000B 128GB (4x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-11CY-2K1HJ MPN CSE-GS7A-2000B

128 GB DDR5 registered ECC server memory kit in four 32 GB modules running at 4800 MT/s CL40 1.1 V for Supermicro workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB kit (4 × 32 GB) expands server capacity
  • DDR5 4800 MT/s (PC5-38400) delivers high bandwidth
  • CL40 CAS latency supports responsive data access
  • ECC registered RDIMM protects data integrity under load
  • 1 V operation reduces power draw per module

SuperMicro SYS-551A-T memory kit

This 128GB kit contains four 32GB DDR5 4800 RDIMM modules built for the SuperMicro SuperWorkstation SYS-551A-T and X13SWA-TF platforms. Each stick runs at 1.10V with CL40 latency and on-die ECC. Registered signalling and 1Rx4 organisation keep data integrity high under sustained server workloads.

Suited for registered ECC platforms only

The modules require a motherboard that accepts 288-pin DDR5 RDIMMs with registered buffering and ECC support. Desktop boards that take only unbuffered UDIMMs cannot use this kit. Laptops and small-form-factor systems using SO-DIMM slots are also incompatible. Buyers needing non-ECC or unbuffered memory should look elsewhere.

Registered ECC with 1Rx4 organisation

Registered buffering places a register between the DRAM and the memory controller, reducing electrical load so larger capacities remain stable. The 1Rx4 chip arrangement delivers 32GB per rank while maintaining error correction. This combination decides whether the kit will post and run reliably in the target SuperMicro workstation.

How it compares

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

Price $3,239.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.31 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 numberMR38400-314K4
Total capacity128 GB (4 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I pick the 4×32 GB kit or a different capacity for my Supermicro SYS-551A-T?

The kit provides 128 GB total using four 32 GB modules, matching the four-channel layout of the Supermicro SYS-551A-T workstation for full bandwidth.

What does the DDR5 4800 CL40 rating actually deliver in this workstation?

The modules run at 4800 MT/s with CAS latency 40 at 1.1 V, giving the peak transfer rate the platform supports for registered ECC memory.

Does the 288-pin RDIMM interface limit the speed on my Supermicro board?

The 288-pin RDIMM form factor is the standard for DDR5 registered ECC; the board's memory controller caps operation at the rated 4800 MT/s.

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