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

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR5 5600 ECC RDIMM CL46 1Rx8 1.1V 288-Pin Lenovo ThinkSystem SR655 V3 memory upgrade

SKU CH-X7CX-3RRMD

A 32 GB kit of two 16 GB DDR5 5600 ECC registered DIMMs with CL46 latency and 1.1 V operation for the Lenovo ThinkSystem SR655 V3

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • ECC protection prevents data errors in critical workloads
  • Registered design improves signal integrity for stable server operation
  • DDR5 5600 speed delivers high bandwidth for AI compute
  • 1V operation reduces power draw in dense configurations
  • 288-pin RDIMM form factor fits Lenovo ThinkSystem SR655 V3 slots

Lenovo ThinkSystem SR655 V3 DDR5 Kit

This 32 GB kit contains two 16 GB DDR5 5600 ECC RDIMM modules built for the Lenovo ThinkSystem SR655 V3 AI server. Registered buffering and on-die ECC protect data integrity in multi-socket workloads. The modules operate at 1.10 V with a CL46 latency profile.

Registered ECC RDIMM Form Factor

Each stick is a 288-pin DDR5 RDIMM organised as 1Rx8, delivering PC5-44800 bandwidth with full error correction. Registered signalling reduces electrical load on the memory controller, allowing higher capacities per channel. No heat spreader is fitted, matching the server’s airflow design.

Suited For Enterprise SR655 V3 Upgrades

Ideal for administrators expanding memory in a validated Lenovo ThinkSystem SR655 V3 configuration that requires registered ECC modules. Not suited for consumer desktops, workstations that need unbuffered DIMMs, or any platform that cannot accept 288-pin DDR5 RDIMMs.

How it compares

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

Price $845.99
Pricier than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $26.44 per GB
Pricier than about 73% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR44800-618K2
Total capacity32 GB (2 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items32 GB (2 × 16 GB) DDR5 5600 MHz PC5-44800 1Rx8 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What does DDR5 5600 speed mean for my ThinkSystem SR655 V3 server?

The 5600 MT/s rating is the maximum data rate the modules can deliver. In the SR655 V3 they will run at the speed the memory controller negotiates, which may be 5600 or a lower supported JEDEC frequency depending on CPU and population.

How does ECC registered operation affect this memory?

ECC detects and corrects single-bit errors, while the registered buffer reduces electrical load on the memory controller. Together they let the SR655 V3 run large capacities with improved data integrity.

Will these 288-pin RDIMMs fit the SR655 V3 memory slots?

Yes. The kit uses the standard 288-pin DDR5 RDIMM form factor required by the ThinkSystem SR655 V3, and the 1Rx8 organisation is compatible with the platform's memory architecture.

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