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Green circuit board SO-DIMM with black heat spreader

Crucial

Crucial CT16G4SFRA266 16GB DDR4 2666 SO-DIMM laptop RAM

SKU CH-EVDY-1CW49 MPN CT16G4SFRA266

16GB DDR4 2666 SO-DIMM kit with CL19 timing, 1.20V operation and a heat spreader to increase bandwidth by up to 30% and cut power draw by up to 40%

  • Capacity16GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Timing19-19-19
  • Voltage1.20V

Capacity 16GB

Speed DDR4 2666 (PC4 21300)

CAS Latency CL19

  • 16GB DDR4 SO-DIMM doubles laptop memory capacity
  • 2666 MT/s speed raises bandwidth by up to 30%
  • 20V operation cuts power draw by up to 40%
  • CL19 19-19-19 timing delivers faster burst access
  • 260-pin unbuffered dual-channel kit fits modern DDR4 slots

16GB DDR4 2666 SO-DIMM for laptops

This 16GB Crucial module runs at 2666 MT/s with CL19 timing and 1.20V operation. It uses the 260-pin SO-DIMM form factor designed for laptop memory slots. The unbuffered, non-ECC design suits mainstream notebooks and mobile workstations. It is sold as a dual-channel kit for matched performance.

Thermals, noise and power draw

Operating at 1.20V, the memory reduces power consumption by up to 40% compared with previous DDR generations, which helps extend battery life in portable systems. The integrated heat spreader dissipates heat without adding moving parts, so the module runs silently. Lower voltage also means less waste heat inside the chassis.

Heat spreader and dual-channel kit

The bundled heat spreader keeps component temperatures stable during sustained workloads without requiring extra airflow. Supplying two matched modules in a dual-channel kit enables the memory controller to interleave accesses, raising effective bandwidth by up to 30% over a single stick. No additional software or drivers are required for operation.

Highlights

  • 16GB DDR4 SO-DIMM doubles laptop memory capacity
  • 2666 MT/s speed raises bandwidth by up to 30%
  • 20V operation cuts power draw by up to 40%
  • CL19 19-19-19 timing delivers faster burst access
  • 260-pin unbuffered dual-channel kit fits modern DDR4 slots

Specifications

BrandCrucial
ModelCT16G4SFRA266
Capacity16GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Timing19-19-19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
Heat SpreaderYes
FeaturesSpeeds up to 2666 MT/s and faster data rates are expected to be available as DDR4 technology matures
Increase bandwidth by up to 30%
Reduce power consumption by up to 40% and extend battery life
Faster burst access speeds for improved sequential data throughout
Optimized for next generation processors and platforms
Shipping weight0.02 kg
Package size94 × 50 × 6 mm

Other versions of this model

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Questions about this item

How do I install the 260-pin DDR4 SO-DIMM and which step do people often miss?

Align the notch on the module with the slot key, insert at a 30-degree angle, then press down firmly until both side clips click; the step users miss is pushing until both clips lock audibly.

What maintenance or replacement will the dual-channel kit need later?

No scheduled maintenance is required; replacement is only needed if a module fails or you upgrade capacity beyond the 16GB kit.

What limit appears first during sustained heavy workloads?

The CL19 latency at 2666 MT/s sets the bandwidth ceiling before thermal throttling becomes a factor.

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