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Two green DDR5 RDIMM modules, bare circuit boards with black chips

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 5600 CL46 ECC RDIMM Server Memory Kit Lenovo ThinkSystem SR680a V3

SKU CH-J7Y3-PT26G

128GB dual-rank DDR5 ECC RDIMM kit with 5600MHz speed and CL46 latency for Lenovo ThinkSystem SR680a V3 servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity from two 64 GB modules
  • DDR5 5600 speed rated at PC5-44800 bandwidth
  • ECC registered RDIMM protects data integrity
  • 4Rx4 organisation with CL46 latency at 1.1 V
  • 288-pin DDR5 form factor built for Lenovo ThinkSystem SR680a V3

System-Specific DDR5 RDIMM Kit

This 128GB kit contains two 64GB DDR5 5600 registered ECC modules built for the Lenovo ThinkSystem SR680a V3 rack server. It targets IT teams expanding memory capacity in that exact platform where registered DIMMs and error correction are required.

Thermals Noise Power

Operating at 1.1V, the modules draw minimal power for DDR5 5600 speed and run without heat spreaders in the server's managed airflow. Registered buffering adds negligible latency while the ECC function corrects single-bit errors transparently during normal operation.

Capacity Rank Decides Fit

The 4Rx4 organisation across two 64GB sticks delivers 128GB total; this rank layout and density must match the SR680a V3 memory population rules or the system will not recognise the kit. Builders needing different rank counts or non-ECC memory cannot use this part.

How it compares

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

Price $3,635.99
Pricier than about 75% 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 $28.41 per GB
Pricier than about 80% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR44800-944K2
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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items128 GB (2 × 64 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules into the Lenovo ThinkSystem SR680a V3, and what step is often missed?

Align the notch on each 288-pin DDR5 RDIMM with the slot key, press firmly until both retention clips click, then verify in BIOS that both 64 GB modules are detected at 5600 MHz; the step often missed is seating the second clip fully.

What maintenance or replacement will the 128 GB DDR5 ECC RDIMM kit need over its service life?

No routine maintenance is required; if a module fails, replace the faulty 64 GB DDR5 RDIMM with an identical 4Rx4 CL46 1.1 V part to retain ECC protection and registered operation.

What limit appears first when the 5600 MHz DDR5 RDIMM kit runs sustained workloads in the SR680a V3?

The CL46 CAS latency at 1.1 V sets the timing ceiling; sustained heavy traffic will hit latency-bound throughput before thermal or voltage limits become a factor.

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