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Four green DDR3L ECC registered DIMMs in anti-static tray

OWC

OWC 64GB (4x16GB) DDR3L 1600 CL11 ECC RDIMM Lenovo ThinkServer RD330 RD340 RD430 RD440 RD530

SKU CH-EFHG-E5FQP

64 GB DDR3L 1600 ECC registered RDIMM kit in four 16 GB modules for Lenovo ThinkServer RD330, RD340, RD430, RD440 and RD530

  • 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 server workloads
  • 64 GB kit with four 16 GB modules expands memory capacity
  • DDR3L 1600 CL11 at 1.35 V matches ThinkServer specifications
  • 240-pin RDIMM form factor fits RD330, RD340, RD430, RD440, RD530
  • Replaces Lenovo part numbers 0C19535, 46W0671, 46W0672

System-specific ECC upgrade kit

This 64GB kit contains four 16GB DDR3L 1600 CL11 registered DIMMs built for Lenovo ThinkServer RD330, RD340, RD430, RD440 and RD530 systems. The modules operate at 1.35V and carry ECC protection for data integrity in server workloads. They are not compatible with standard desktop motherboards or unbuffered memory configurations.

Sustained server workload behaviour

Registered buffering and ECC correction maintain signal quality across all four slots during continuous operation. The 2Rx4 organisation supports high-density population without reducing command-rate stability. JEDEC-compliant 1600MHz timing delivers consistent throughput for virtualisation, database and file-serving tasks that run for extended periods.

Thermals, noise and power draw

Modules run without heat spreaders, relying on chassis airflow for cooling in the target ThinkServer platforms. Low 1.35V DDR3L voltage reduces per-DIMM power compared with standard 1.5V DDR3, helping total system power stay within original design limits. Silent operation adds no acoustic load to rack or tower deployments.

How it compares

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

Price $170.99
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 $2.67 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 ThinkServer RD330
Lenovo ThinkServer RD340
Lenovo ThinkServer RD430
Lenovo ThinkServer RD440
Lenovo ThinkServer RD530

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 ThinkServer runs continuously?

Each 16 GB module operates at 1.35 V, lower than standard DDR3, reducing heat output during all-day server workloads.

What must the Lenovo ThinkServer already have to accept this 240-pin ECC registered memory?

The RD330, RD340, RD430, RD440 or RD530 must support DDR3L 1600 registered DIMMs and have four free 240-pin slots for the 4×16 GB kit.

Can I mix these CL11 2Rx4 modules with older unbuffered DIMMs still installed in my RD440?

No — the kit is ECC registered (RDIMM) and cannot be mixed with unbuffered memory; all slots must use registered modules.

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