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Four green DDR5 RDIMM modules with gold contacts and black chips

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 5600 CL46 2Rx4 ECC RDIMM memory upgrade

SKU CH-RZNJ-QKE8G

256 GB registered ECC DDR5 kit with four 64 GB modules at 5600 MT/s CL46 for Lenovo ThinkSystem SR685a V3

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across four 64 GB modules
  • DDR5 5600 speed with PC5-44800 bandwidth rating
  • ECC registered design detects and corrects data errors
  • 1 V operating voltage reduces server power draw
  • Validated for Lenovo ThinkSystem SR685a V3 rack servers

Server Memory Kit

This 256GB kit contains four 64GB DDR5 5600 RDIMM modules built for Lenovo ThinkSystem SR685a V3 rack servers. It targets administrators who need registered ECC memory for enterprise workloads and virtualization.

Build and Connectors

Each module uses a 288-pin DDR5 RDIMM form factor with 2Rx4 organisation and runs at 1.10V without a heat spreader. The registered design adds a buffer that reduces electrical load on the server memory controller.

DDR5 Limits

DDR5 5600 operates at CL46 latency and PC5-44800 bandwidth, which caps throughput for latency-sensitive tasks. The registered ECC architecture prioritises data integrity over raw speed, so it suits stable server operation rather than low-latency desktop use.

How it compares

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

Price $8,165.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.90 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 numberMR44800-924K4
Total capacity256 GB (4 × 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 items256 GB (4 × 64 GB) DDR5 5600 MHz PC5-44800 2Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What DDR5 speed and bandwidth does this 256GB kit provide?

The kit runs at DDR5 5600 with a PC5-44800 bandwidth rating, delivering 5600 MT/s data transfer across four 64GB modules.

What physical slot and form factor are required for these 288-pin RDIMMs?

Each module uses the standard 288-pin DDR5 RDIMM form factor and fits server motherboards with matching registered DIMM slots.

How are the four 2Rx4 ECC registered modules installed in the ThinkSystem SR685a V3?

Populate all four modules in the server's designated DDR5 RDIMM slots following the platform's population sequence; a common mistake is skipping the required slot order for registered memory.

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