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Four green DDR5 RDIMM sticks with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 5600 ECC RDIMM CL46 1.1V Lenovo SR685a V3 memory upgrade

SKU CH-M0PY-BR64V

A 128 GB DDR5 ECC RDIMM kit with four 32 GB modules at 5600 MT/s, CL46 and 1.1 V for Lenovo ThinkSystem SR685a V3 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB total capacity for memory-intensive workloads
  • DDR5 5600 speed with PC5-44800 bandwidth rating
  • ECC registered design protects data integrity in servers
  • 10 V operation reduces power draw per module
  • Validated for Lenovo ThinkSystem SR685a V3 rack servers

Lenovo SR685a V3 DDR5 memory kit

This 128GB kit contains four 32GB DDR5 5600 ECC RDIMM modules built for the Lenovo ThinkSystem SR685a V3 rack server. Each module runs at 1.1V with CL46 latency and uses a registered 288-pin design for stable server operation.

Replaces lower-capacity or slower DDR5 DIMMs

The jump is worthwhile when workloads exceed the capacity of smaller kits or when the server requires registered ECC modules at the full 5600 MT/s data rate. Systems already populated with matching 5600 RDIMMs will not see a speed increase from this upgrade.

DDR5 5600 registered ECC constraints

Registered DIMMs add a clock cycle of buffering that unbuffered platforms cannot use, so this kit will not function in consumer motherboards. The 1Rx4 organisation and fixed CL46 timing limit manual tuning, and the 1.1V operating voltage is specific to the DDR5 server standard.

How it compares

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

Price $3,845.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $30.05 per GB
Pricier than about 86% 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 numberMR44800-314K4
Total capacity128 GB (4 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items128 GB (4 × 32 GB) DDR5 5600 MHz PC5-44800 1Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the memory slots in a Lenovo ThinkSystem SR685a V3?

Yes, the kit uses the standard 288-pin DDR5 RDIMM form factor required by the SR685a V3 server platform.

What is the correct order for populating the four 32GB modules during installation?

Follow the SR685a V3 service guide slot sequence; a common error is filling adjacent slots instead of the prescribed population order per processor.

How can I identify a failed module in the 128GB kit for later replacement?

Each 32GB stick carries part number MR44800-314K4; match that label when ordering a single replacement module.

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