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Two green DDR5 RDIMM modules with black chips, no heat spreader, 288-pin, 128GB each

NEMIX RAM

NEMIX RAM CSE-GS7A-000NBP3 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-20HF-W6E05 MPN CSE-GS7A-000NBP3

256 GB dual-module DDR5 ECC registered server memory kit running at 4800 MT/s with CL40 latency for Supermicro workstations

  • 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 with two 128 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400
  • ECC registered RDIMM protects data integrity in servers
  • 1 V operating voltage reduces power draw
  • Validated for Supermicro SuperWorkstation SYS-751A-I

Target System Compatibility

This 256GB DDR5 kit is built specifically for the SuperMicro SuperWorkstation SYS-751A-I and Super X13DAI-T platforms. It suits IT professionals and organisations that need registered ECC memory validated for those exact workstation and server models.

Installation Notes

The modules use the standard 288-pin DDR5 RDIMM form factor and install in minutes by seating them in the motherboard DIMM slots. Because each stick is a 128GB 4Rx4 registered module, the platform must support that rank configuration and registered operation; otherwise the system will not post.

Decisive Specification

The kit delivers 256GB total capacity as two 128GB modules running at DDR5 4800 with CL40 latency at 1.10V. If your workload requires a different speed, voltage, rank layout or non-ECC memory, this part will not meet that requirement.

How it compares

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

Price $7,087.99
Pricier than about 83% 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 $27.69 per GB
Pricier than about 77% 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

How can I confirm the 256GB DDR5 4800 kit is running at CL40 with ECC active after installation?

Enter the BIOS or use a hardware-info utility such as CPU-Z and verify the reported speed shows 4800 MT/s, CAS latency 40, voltage 1.10 V and that ECC is listed as enabled for each 128GB module.

What exactly ships in the box and do I need any extra brackets or cables?

The package contains two 128GB 288-pin DDR5 RDIMM modules (256GB total); no heat spreaders, brackets, cables or tools are included or required for installation.

Which capacity version should I choose for a Supermicro SYS-751A-I workstation that supports 4Rx4 registered DIMMs?

This 256GB kit (2×128GB, 4Rx4, PC5-38400, CL40, 1.10 V) matches the workstation's qualified DDR5 RDIMM specification; select it when you need the maximum two-module capacity.

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