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Four green DDR3L RDIMM modules with gold contacts and black chips

OWC

OWC 64GB (4×16GB) DDR3L 1600 ECC Registered RDIMM memory upgrade

SKU CH-Z6ZJ-8WZYX

A 64 GB DDR3L 1600 ECC registered RDIMM kit of four 16 GB modules for Lenovo Flex System compute nodes x220, x222, x240 and x440

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR3L 1600 (PC3L 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (4 x 16GB)

  • ECC registered design protects data integrity in servers
  • 64 GB kit with four 16 GB modules maximises capacity
  • DDR3L 1600 CL11 at 1.35 V reduces power draw
  • 240-pin RDIMM fits Lenovo Flex System x220 x222 x240 x440
  • Replaces Lenovo part numbers 0C19535 46W0671 46W0672

Server memory kit

This OWC kit supplies 64 GB of DDR3L ECC registered memory across four 16 GB modules. It is built for Lenovo Flex System compute nodes x220, x222, x240 and x440. The modules run at 1600 MHz with CL11 latency and 1.35 V operation. Standard desktop systems cannot use this registered ECC type.

Sustained workload behaviour

ECC circuitry detects and corrects single-bit errors during continuous operation, helping maintain data integrity in server and workstation roles. Registered buffering reduces electrical load on the memory controller when all four slots are populated. The 1.35 V DDR3L voltage lowers power draw compared with standard DDR3 during extended use.

Pre-installation checks

Verify that the target node is one of the four listed Flex System models. Confirm the system requires registered ECC RDIMMs and does not use unbuffered memory, as the two types cannot be mixed. Ensure the platform supports 2Rx4 rank organisation and 240-pin DDR3L modules at 1.35 V. Lenovo part numbers 0C19535, 46W0671 and 46W0672 are referenced as replacements.

How it compares

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

Price $168.99
Cheaper than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $2.64 per GB
Cheaper than about 91% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1R6T32R4064S
Total capacity64 GB (4 × 16 GB)
Product type240-Pin DDR3L ECC RDIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsLenovo Flex System Compute Node x220
Lenovo Flex System Compute Node x222
Lenovo Flex System Compute Node x240
Lenovo Flex System Compute Node x440

Other versions of this model

5 more in the same range

Questions about this item

How much power does the 1.35 V DDR3L kit draw when the server runs all day?

Each module operates at 1.35 V, lower than standard DDR3, reducing power draw and heat in the Lenovo Flex System compute nodes.

What must the system already have to accept these 240-pin registered DIMMs?

A Lenovo Flex System Compute Node x220, x222, x240 or x440 with DDR3L RDIMM slots and a BIOS that supports ECC registered memory.

Can I keep the existing Lenovo 46W0671 modules and add this 64 GB kit alongside them?

This kit replaces part numbers 0C19535, 46W0671 and 46W0672; mixing registered with unbuffered DIMMs is not supported.

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