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OWC

OWC 64GB (2x32GB) DDR4 2666MHz ECC SODIMM laptop RAM

SKU CH-J5FK-J0NCR

A 64GB dual-channel DDR4 2666MHz ECC SODIMM kit with CL19 latency and 1.2V operation for compatible laptops, NAS and micro servers

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 64GB (2 x 32GB)

  • 64GB dual-channel kit expands multitasking headroom
  • ECC protection guards data integrity in NAS and servers
  • JEDEC-standard 2666MHz CL19 ensures broad laptop compatibility
  • Low 1.2V operation reduces power draw and heat
  • Backward compatible with 2400MHz and 2133MHz systems

64GB DDR4 ECC SODIMM kit

This OWC kit provides 64GB of DDR4 ECC memory in a matched pair of 32GB modules. It uses the 260-pin SO-DIMM form factor for laptops, all-in-one PCs and compatible NAS units. The modules run at 2666MHz with CL19 latency and 1.2V operation. ECC support adds data-integrity protection for workloads that require it.

Thermals and power

The modules operate at the standard 1.2V DDR4 voltage and have no heat spreader. Power draw stays within normal JEDEC limits for DDR4 2666 SO-DIMMs. Passive cooling in a typical laptop or NAS chassis is sufficient; no active airflow is required. Acoustic impact is zero because the parts have no moving components.

ECC unbuffered specification

This kit is unbuffered ECC DDR4, not registered or load-reduced. The system memory controller must support unbuffered ECC SO-DIMMs for the error-correction feature to function. Buyers whose platforms accept only non-ECC or registered memory cannot use the ECC capability. The kit is backward compatible with 2400MHz and 2133MHz DDR4 slots.

How it compares

Measured against everything we stock in Laptop RAM, at today’s prices. Recalculated every night.

Price $447.99
Pricier than about 90% of the 2,079 comparable items (median $70.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 91% of the 1,886 comparable items (median 16 GB).
Price per GB $7.00 per GB
Pricier than about 61% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameOWC
Part number2C6D42R8064P
Total capacity64 GB (2 × 32 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forLaptops, All-in-One Systems, and NAS Systems

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 260-pin DDR4 SODIMM modules and what step is often missed?

Power off the laptop, remove the battery if possible, then insert each 32 GB module at an angle until the 260-pin edge connector seats fully and the retention clips click; the step often missed is pressing down firmly until both clips lock.

What maintenance or replacement will the ECC SODIMM kit need later?

The modules have no heat spreader and no moving parts, so no routine maintenance is required; replacement is only needed if a module fails or capacity must be increased beyond 64 GB.

What limit appears first under sustained use with these CL19 2666 MHz modules?

The CAS latency of CL19 at 2666 MHz sets the timing boundary; under continuous load the memory controller will hit this latency ceiling before any thermal or voltage limit is reached.

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