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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 5600 ECC RDIMM memory upgrade

SKU CH-6HSY-PTGSM

256 GB DDR5 5600 ECC registered server memory kit with two 128 GB modules at CL46 and 1.1 V for Lenovo ThinkSystem SR685a V3

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity with two 128 GB modules
  • DDR5 5600 speed rated at PC5-44800 bandwidth
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces server power draw
  • Validated for Lenovo ThinkSystem SR685a V3 rack servers

Lenovo ThinkSystem SR685a V3 DDR5 upgrade

This 256GB kit contains two 128GB registered DIMMs built for the Lenovo ThinkSystem SR685a V3 rack server. ECC and registered operation provide the error correction and signal buffering that enterprise workloads demand.

288-pin RDIMM installation in qualified slots

The modules plug directly into the server’s DDR5 RDIMM slots without adapters or risers. Registered signalling reduces electrical load on the memory controller, freeing electrical headroom for dense population across all channels.

5600 MT/s CL46 at 1.10V with 4Rx4 density

Each DIMM runs at PC5-44800 speed with CAS latency 46, delivering 256GB total capacity for virtualisation, databases and in-memory analytics. The 4Rx4 organisation maximises rank density, so further expansion depends on remaining DIMM slots and the platform’s maximum supported memory.

How it compares

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

Price $7,997.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.24 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 numberMR44800-744K2
Total capacity256 GB (2 × 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 items256 GB (2 × 128 GB) DDR5 5600 MHz PC5-44800 4Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the CL46 latency become a bottleneck during sustained heavy workloads on the SR685a V3?

CL46 is the rated CAS latency at DDR5 5600 speed; under sustained load the registered ECC design and 1.1 V operation maintain stability within that timing envelope.

What are the thermal and acoustic characteristics when both 128 GB modules run continuously in a rack server?

The modules have no heat spreader and operate at 1.10 V; they rely on the SR685a V3 chassis airflow for cooling and produce no audible noise themselves.

Which Lenovo server generation must already be installed for this 288-pin RDIMM kit to function?

This kit is validated for the Lenovo ThinkSystem SR685a V3 rack server; the system must be present to accept the 288-pin DDR5 RDIMM form factor.

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