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Four green DDR5 RDIMM modules in anti-static bags

NEMIX RAM

NEMIX RAM 512GB (4×128GB) DDR5 5600 CL46 1.1V 4Rx4 ECC RDIMM Lenovo SR685a V3 memory upgrade

SKU CH-KF62-7K0NH

512 GB DDR5 server memory kit with four 128 GB registered ECC RDIMMs at 5600 MHz CL46 1.1 V for Lenovo ThinkSystem SR685a V3

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 5600 speed with CL46 latency for responsive throughput
  • ECC registered RDIMM design protects data integrity
  • 1 V operation reduces server power draw
  • Validated for Lenovo ThinkSystem SR685a V3 compatibility

Lenovo SR685a V3 512GB DDR5 kit

This 512GB kit contains four 128GB DDR5 5600 registered DIMMs built for the Lenovo ThinkSystem SR685a V3 rack server. IT teams buying for virtualisation hosts or database nodes get ECC protection and registered signalling in a single validated package. The modules run at 1.1V with CL46 latency and use a 4Rx4 organisation.

DDR5 5600 registered ECC limits

The DDR5 5600 standard tops out at 5600 MT/s and the registered buffer adds one cycle of command latency compared with unbuffered modules. ECC corrects single-bit errors and detects double-bit errors but cannot repair them. Four ranks per DIMM increase electrical loading so the memory controller must support 4Rx4 population rules.

288-pin RDIMM build and daily fit

Each stick is a plain 288-pin RDIMM without a heat spreader so airflow in dense server chassis passes directly over the DRAM. The 1.1V operating voltage matches the DDR5 baseline and keeps power draw predictable. Registered signalling and ECC mean the modules only work in platforms wired for registered ECC memory.

How it compares

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

Price $17,957.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $35.07 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 numberMR44800-744K4
Total capacity512 GB (4 × 128 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 items512 GB (4 × 128 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I choose the 512GB kit with four 128GB modules or a different capacity for my SR685a V3?

This kit provides 512GB total using four 128GB DDR5 5600 CL46 ECC RDIMMs; choose it when your workload needs maximum registered capacity in four slots.

What does the 5600 speed rating deliver once installed in the server?

The modules run at DDR5 5600 (PC5-44800) with CL46 latency at 1.1V, giving the rated throughput and timing the platform negotiates for registered ECC memory.

How does the 288-pin DDR5 RDIMM interface affect compatibility and bandwidth limits?

The 288-pin registered DIMM fits the SR685a V3 DDR5 slots; the 4Rx4 organisation and ECC function operate within the server memory controller's supported ranks and error-correction capability.

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