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Four green DDR3L ECC registered DIMMs with gold contacts

OWC

OWC 64GB (4x16GB) DDR3L 1600 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-8ZAP-421JM

64 GB DDR3L ECC registered kit in four 16 GB modules at 1600 MHz for Lenovo Flex System x280 X6, x480 X6 and x880 X6 servers

  • Capacity64GB (4 x 16GB)
  • Type240-Pin DDR3L ECC RDIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Voltage1.35V
  • ECCYes

Capacity 64GB (4 x 16GB)

  • ECC Registered design protects data integrity in servers
  • 64GB kit with four 16GB modules expands capacity
  • DDR3L 1600 speed at 1.35V lowers power draw
  • CL11 2Rx4 registered timing suits Lenovo Flex System x280 X6, x480 X6, x880 X6
  • Replaces Lenovo part numbers 0C19535, 46W0671 and 46W0672

Server-grade ECC RDIMM kit

This OWC upgrade kit delivers 64GB of DDR3L 1600 registered ECC memory across four 16GB modules. It is built for Lenovo Flex System x280 X6, x480 X6 and x880 X6 servers that require 240-pin RDIMMs with 2Rx4 organisation. The modules operate at 1.35V and carry CL11 latency. They are not compatible with standard desktop platforms or unbuffered memory configurations.

Low-voltage registered operation

Each module runs at the DDR3L 1.35V specification, reducing power draw compared to standard 1.5V DDR3 while maintaining 1600MHz throughput. Registered buffering places less electrical load on the server memory controller, helping sustain stability in fully populated slots. No heat spreaders are fitted, so airflow across the DIMMs follows the chassis design of the supported Flex System nodes.

Direct Lenovo part replacement

The kit replaces Lenovo part numbers 0C19535, 46W0671 and 46W0672, simplifying procurement for existing fleets. Modules are validated to JEDEC and RoHS standards and backed by OWC’s advanced replacement programme with lifetime technical support. No additional software or accessories are included; the value is in verified compatibility and warranty coverage for the listed server models.

Puntos fuertes

  • ECC Registered design protects data integrity in servers
  • 64GB kit with four 16GB modules expands capacity
  • DDR3L 1600 speed at 1.35V lowers power draw
  • CL11 2Rx4 registered timing suits Lenovo Flex System x280 X6, x480 X6, x880 X6
  • Replaces Lenovo part numbers 0C19535, 46W0671 and 46W0672

Especificaciones

BrandOWC
Part Number1R6T32R4064S
Capacity64GB (4 x 16GB)
Type240-Pin DDR3L ECC RDIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Voltage1.35V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo Flex System x280 X6
Lenovo Flex System x480 X6
Lenovo Flex System x880 X6

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Preguntas sobre este artículo

How do I install the 240-pin DDR3L RDIMM modules in a Lenovo Flex System x280 X6, and which step is often missed?

Power down, open the chassis, align each module notch with the slot key, press firmly until the retention clips click, then verify all four 16GB modules appear at 1600 MHz in the BIOS; the step often missed is seating every clip fully before closing the cover.

What maintenance or replacement will the 64GB ECC Registered kit need later?

The modules have no heat spreaders and no moving parts, so no scheduled maintenance is required; replacement is only necessary if a DIMM fails, which the ECC logic will flag in system logs.

What limit appears first under sustained load with the 1.35V CL11 DDR3L 1600 kit?

The registered buffer and CL11 latency set the throughput ceiling, so memory bandwidth saturates before the 1.35V thermal envelope becomes a constraint.

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