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Eight green DDR4 SODIMM sticks with black chips, no heat spreaders

OWC

OWC 256GB (8x32GB) DDR4 2666MHz CL19 2RX8 Non-ECC SODIMM 1.2V 260-pin laptop RAM

SKU CH-111M-7VQEF

An eight-module kit delivering 256GB of DDR4 2666MHz CL19 laptop memory for high-capacity multitasking

  • Capacity256GB (8 x 32GB)
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • Massive 256GB capacity from eight 32GB modules
  • DDR4 2666MHz speed for responsive multitasking
  • Low 1.2V voltage reduces power draw
  • JEDEC compliant for broad laptop compatibility
  • Backward compatible with 2400MHz and 2133MHz systems

Capacity and Compatibility

This kit supplies 256GB of DDR4 memory across eight 32GB SO-DIMM modules. It targets laptops, all-in-one PCs, mini desktops, micro servers and NAS appliances that accept 260-pin DDR4 at 1.2V. The non-ECC, unbuffered design matches mainstream mobile platforms.

Upgrade Path and Backward Compatibility

The modules run at 2666MHz CL19 and are backward compatible with 2400MHz and 2133MHz systems. The jump is worthwhile when a device currently limits multitasking or large-file workflows at lower capacities or speeds. It will not benefit machines already at their maximum supported memory ceiling.

Sustained Operation

JEDEC compliance and 1.2V operation keep thermals steady during extended workloads. Without a heat spreader, the modules rely on the host chassis airflow, which is typical for SO-DIMM slots in compact enclosures. Stability is validated for continuous use in NAS and micro-server roles.

Highlights

  • Massive 256GB capacity from eight 32GB modules
  • DDR4 2666MHz speed for responsive multitasking
  • Low 1.2V voltage reduces power draw
  • JEDEC compliant for broad laptop compatibility
  • Backward compatible with 2400MHz and 2133MHz systems

Specifications

BrandOWC
Part Number2S6D42R8256K
Capacity256GB (8 x 32GB)
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
Heat SpreaderNo
Recommend UseLaptops, All-in-One Systems, and NAS Systems

Questions about this item

Will the 260-pin SO-DIMM modules fit my laptop's DDR4 memory slots?

Yes, each 32GB module uses the standard 260-pin DDR4 SO-DIMM form factor designed for laptop, all-in-one, and NAS systems.

What is the correct way to install the 8 modules for dual-channel operation, and what step is often missed?

Install modules in matched pairs per your system's channel layout; the step often missed is pressing each module firmly until the side retention clips click audibly into place.

Will these CL19 2666MHz modules need any firmware updates or replacement if my system only supports 2400MHz or 2133MHz speeds?

No firmware updates are needed; the modules are backwards compatible and will automatically run at 2400MHz or 2133MHz when installed in slower systems.

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