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OWC

OWC 64GB (8x8GB) DDR4 2933MHz CL21 ECC Unbuffered SODIMM 1.2V laptop RAM

SKU CH-4AZ4-BW3EH

Eight 8 GB DDR4 2933 MHz ECC unbuffered SODIMMs provide 64 GB for laptops, NAS and micro-servers with 1.2 V operation and backward compatibility to 2133 MHz

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 64GB (8 x 8GB)

  • 64 GB total capacity from eight 8 GB modules
  • DDR4 2933 MHz CL21 speed for responsive multitasking
  • ECC error correction protects data integrity in NAS and servers
  • 2 V low voltage reduces power draw and heat
  • Backward compatible with 2666, 2400 and 2133 MHz systems

Capacity and purpose

This OWC kit delivers 64GB of DDR4 laptop memory across eight 8GB modules rated at 2933MHz with CL21 latency. It targets users of compatible laptops, all-in-one PCs and NAS appliances who need ECC unbuffered SO-DIMMs for data-integrity workloads.

Thermals and power

Each module operates at the standard 1.2V DDR4 voltage and carries no heat spreader, relying on the host system's airflow for cooling. Power draw stays within JEDEC limits for DDR4 2933 SO-DIMMs, and the unbuffered design adds no extra electrical load.

Upgrade context

The kit replaces lower-capacity or non-ECC DDR4 SO-DIMMs in systems that support 260-pin ECC unbuffered memory and can clock down to 2666MHz, 2400MHz or 2133MHz. It is not suited for platforms that require registered DIMMs, desktop-length modules or non-ECC-only memory controllers.

How it compares

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

Price $442.99
Pricier than about 90% of the 2,079 comparable items (median $70.99).
Total capacity 64 GB (8 × 8 GB)
Higher than about 91% of the 1,886 comparable items (median 16 GB).
Price per GB $6.92 per GB
Pricier than about 60% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameOWC
Part number2C9D41R8064K
Total capacity64 GB (8 × 8 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
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 SODIMM modules and what step is commonly missed?

Align the notch on each 8GB module with the slot key, insert at an angle, then press down until both side clips click; the step often missed is pressing firmly enough to engage both clips.

What maintenance or replacement will the ECC unbuffered memory need over time?

No scheduled maintenance is required; the modules run at 1.2V with no heat spreader, so only replace if a module fails or capacity needs increase.

What limit appears first under sustained load with the CL21 2933MHz kit?

The CAS latency of CL21 at 2933MHz sets the timing ceiling; sustained workloads will hit latency bounds before bandwidth saturates.

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