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Two green DDR5 RDIMM sticks in anti-static bag

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 5600 CL46 ECC RDIMM Lenovo SR780a V3 memory upgrade

SKU CH-ASTF-WKEXG

A 128 GB DDR5 ECC registered kit (2 × 64 GB) validated for the Lenovo ThinkSystem SR780a V3 server

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB total capacity across two 64GB modules
  • DDR5 5600 speed rated at PC5-44800 bandwidth
  • ECC registered design detects and corrects data errors
  • 1V operating voltage reduces power draw
  • Validated for Lenovo ThinkSystem SR780a V3 servers

Capacity and form factor

This kit provides 128GB of DDR5 memory across two 64GB registered DIMMs. Each module uses a 288-pin interface and a 2Rx4 organisation with ECC for error correction. The memory operates at 1.10V and carries a CAS latency of CL46.

Target platform and exclusions

The kit is validated for the Lenovo ThinkSystem SR780a V3 rack server and will not function in consumer desktop boards or laptops that require unbuffered non-ECC modules. Systems lacking DDR5 RDIMM support or those limited to lower maximum capacities per slot should look elsewhere.

Sustained operation

Registered buffering and on-die ECC maintain data integrity during continuous server workloads such as virtualisation and database processing. The 1.1V operating voltage helps limit thermal output when all slots are populated under prolonged load.

How it compares

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

Price $4,094.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.99 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 lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 5600 MHz ECC RDIMM Registered Server Memory
Part numberMR44800-924K2
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items128 GB (2 × 64 GB) DDR5 5600 MHz PC5-44800 2Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does this kit require a Lenovo ThinkSystem SR780a V3 server to operate?

Yes, the 128GB kit is built for the Lenovo ThinkSystem SR780a V3 and uses 288-pin DDR5 RDIMM modules that only fit that platform.

Can I keep older DDR5 RDIMMs installed while adding this 2x64GB kit?

The server must support mixed-capacity registered ECC modules at 5600 speed; check the system manual for approved population rules before mixing ranks.

How do I verify the memory runs at 5600 MT/s with CL46 after installation?

Enter the BIOS or use a tool like ipmitool to confirm the memory reports PC5-44800, 1.10V, and CL46 timings on each 64GB module.

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