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Eight green circuit boards with black chips, 260-pin SODIMM form factor

OWC

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

SKU CH-MD9G-A7PKV

Eight 16 GB DDR4 2400 MHz CL17 SODIMM modules provide 128 GB total capacity for laptops, mini desktops and NAS systems at 1.2 V

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit
  • 128 GB total capacity from eight 16 GB modules
  • DDR4 2400 MHz speed with CL17 latency for responsive performance
  • 2 V low-voltage operation reduces power draw
  • 260-pin SO-DIMM form factor fits laptops and compact systems
  • Backwards compatible with 2133 MHz and 2400 MHz platforms

128GB DDR4 SO-DIMM kit for laptops and NAS

This kit supplies 128GB of DDR4 memory in eight 16GB modules rated at 2400MHz with CL17 latency. It targets users of laptops, all-in-one PCs, mini desktops and NAS appliances that accept 260-pin SO-DIMMs. The 1.2V unbuffered non-ECC design matches standard notebook voltage requirements.

Eight matched modules enable full population

Eight identical 16GB sticks let you fill every slot on platforms that support up to eight SO-DIMM sockets, delivering the full 128GB capacity in a single purchase. JEDEC and RoHS compliance means the kit meets industry specifications without requiring manual configuration. Backward compatibility with 2133MHz systems allows the modules to downclock automatically where needed.

Low-profile design suits space-constrained chassis

The modules carry no heat spreader, keeping the height low enough for thin laptops and compact NAS enclosures. Gold-edge 260-pin connectors provide reliable contact in standard SO-DIMM sockets. Unbuffered construction ensures direct signal routing for typical consumer and small-business platforms.

How it compares

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

Price $673.99
Pricier than about 91% 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 $5.27 per GB
Cheaper than about 60% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameOWC
Part number2S4D42R8128K
Total capacity128 GB (8 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportNo
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

Will any of the 8 SODIMMs need replacement if a single module fails?

The kit contains eight individual 16 GB modules. If one module develops a fault, only that specific stick needs to be swapped; the remaining seven continue working normally.

What is the first bottleneck when all 128 GB run at full load for hours?

The CL17 latency at 2400 MHz sets the timing ceiling. Sustained bandwidth is capped by the DDR4 2400 MT/s data rate, so latency-sensitive workloads hit that limit before thermal or power constraints appear.

How much heat and power do the 1.2 V modules produce during all-day operation?

Each module runs at the standard 1.2 V DDR4 voltage with no heat spreader. Under continuous load they draw nominal DDR4 power and run warm but within normal SO-DIMM thermal limits for laptops and NAS units.

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