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Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (2×128GB) DDR5 5600 CL46 4Rx4 ECC RDIMM memory upgrade for Lenovo ThinkSystem SR680a V3

SKU CH-3RJ3-RNARR

A 256GB DDR5 kit of two 128GB ECC registered modules rated at 5600MT/s CL46 1.1V for Lenovo ThinkSystem SR680a V3

  • Capacity256GB (2 x 128GB)
  • SpeedDDR5 5600 (PC5 44800)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V
  • 256 GB kit doubles server capacity with two 128 GB modules
  • DDR5 5600 speed feeds data at PC5-44800 bandwidth
  • ECC registered design corrects errors for mission-critical workloads
  • 4Rx4 organisation maximises density per 288-pin slot
  • 10 V operation reduces power draw under heavy load

Lenovo SR680a V3 DDR5 5600 RDIMM kit

This 256 GB kit contains two 128 GB DDR5 5600 registered DIMMs built for the Lenovo ThinkSystem SR680a V3. Each module runs at 1.1 V with CL46 latency and 4Rx4 organisation. ECC and registered buffering protect data integrity in demanding server workloads.

Suited for SR680a V3 capacity upgrades.

IT teams expanding memory in a compatible Lenovo rack server will find the correct speed, voltage and rank configuration here. Builders using consumer motherboards or systems that require unbuffered non‑ECC modules should look elsewhere because this kit is registered ECC RDIMM only.

4Rx4 registered ECC at DDR5 5600 decides fit

The decisive specification is the 4Rx4 registered ECC design running at DDR5 5600 (PC5‑44800). Only platforms that explicitly support this rank structure, voltage and form factor can use the kit. Verify the server memory list before purchasing.

Highlights

  • 256 GB kit doubles server capacity with two 128 GB modules
  • DDR5 5600 speed feeds data at PC5-44800 bandwidth
  • ECC registered design corrects errors for mission-critical workloads
  • 4Rx4 organisation maximises density per 288-pin slot
  • 10 V operation reduces power draw under heavy load

Specifications

BrandNEMIX RAM
SeriesLenovo Server/Workstation Compatible Series Memory
ModelLenovo DDR5 5600MHZ ECC RDIMM Registered Server Memory
Part NumberMR44800-744K2
Capacity256GB (2 x 128GB)
SpeedDDR5 5600 (PC5 44800)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemLenovo
CAS LatencyCL46
Heat SpreaderNo
Type288-Pin DDR5 RDIMM
Rank4Rx4
FeaturesDDR5 ECC Registered RDIMM Server Motherboard Compatible
Package Content256GB (2X128GB) DDR5 5600MHZ PC5-44800 4Rx4 1.1V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does my Lenovo ThinkSystem SR680a V3 need a specific BIOS version to recognise the 5600 CL46 4Rx4 registered modules?

The kit is built to the server's qualified DDR5 5600 PC5-44800 4Rx4 1.1V CL46 specification, so the existing firmware that supports this speed and rank configuration will detect both 128 GB modules at POST.

Can I keep my current DDR5 4800 RDIMMs installed in the other slots while adding this 256 GB kit?

The SR680a V3 memory controller will train all populated channels to the lowest common speed; mixing 4800 and 5600 RDIMMs is possible but the 5600 modules will run at 4800.

How do I confirm the 256 GB kit is operating at 5600 MT/s with ECC active after installation?

Enter the system BIOS or UEFI and verify the memory frequency reads 5600 MT/s, the total capacity shows 256 GB, and ECC status reports enabled for both modules.

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