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Eight green circuit boards with gold edge connectors and black memory chips

OWC

OWC 128GB (8x16GB) DDR4 2400MHz CL17 ECC SODIMM 1.2V 260-pin laptop RAM

SKU CH-SAS7-CQN6S

128 GB ECC DDR4 SODIMM kit runs at 2400 MHz CL17 across eight 16 GB modules for laptops and NAS

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit
  • 128GB total capacity from eight 16GB modules for demanding workloads
  • ECC error correction protects data integrity in NAS and micro servers
  • DDR4 2400MHz CL17 speed with 1.2V low-voltage operation
  • 260-pin SO-DIMM form factor fits compatible laptops and all-in-one systems
  • Backward compatible with 2133MHz systems for flexible upgrades

Capacity and purpose

This kit delivers 128GB of DDR4 ECC memory across eight 16GB SO-DIMM modules. It targets laptops, all-in-one desktops and NAS appliances that require error-correcting code for data integrity. The 260-pin form factor fits standard DDR4 SODIMM slots. Buyers needing non-ECC memory or higher speeds should look elsewhere.

Installation notes

Each module is unbuffered and operates at 1.2V, matching typical laptop voltage requirements. The CL17 timing at 2400MHz is backward compatible with 2133MHz systems. Common issues include BIOS limitations on maximum capacity per slot and motherboards that disable ECC functionality despite accepting the modules physically.

Sustained load behaviour

Rated at PC4-19200 bandwidth, the memory maintains JEDEC-standard performance during extended workloads such as ZFS checksum calculations or virtual machine hosting. Without heat spreaders, thermal throttling depends entirely on chassis airflow. ECC operation continues to correct single-bit errors throughout continuous operation without interrupting service.

How it compares

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

Price $978.99
Pricier than about 92% of the 2,079 comparable items (median $70.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 94% of the 1,886 comparable items (median 16 GB).
Price per GB $7.65 per GB
Pricier than about 67% of the 1,886 comparable items (median $5.94 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2C4D42R8128K
Total capacity128 GB (8 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
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

Questions about this item

How can I confirm the ECC DDR4-2400 CL17 modules are running at the correct speed and timings after installation?

Check the BIOS or a tool such as CPU-Z; each 16GB module should show 2400MHz, CL17, 1.2V and ECC active.

What does the 128GB kit contain and is anything else required to install it?

The kit includes eight 16GB 260-pin DDR4 SODIMM sticks; no extra parts or cables are needed for a compatible laptop or NAS.

Should I choose this 8x16GB ECC kit or a different capacity for my system?

Pick this 128GB kit only if your device supports eight SODIMM slots and requires ECC; otherwise select a smaller kit that matches your slot count.

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