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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%

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered

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.

How it compares

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

Price $53.99
Cheaper than about 57% of the 2,079 comparable items (median $70.99).
Total capacity 16 GB
Typical for this category: the median of 1,886 items is 16 GB.
Price per GB $3.37 per GB
Cheaper than about 88% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameCrucial
Model nameCT16G4SFRA266
Total capacity16 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderYes
Power
Rated voltage1.2 V
Size & build
Shipping weight0.02 kg
Package size94 × 50 × 6 mm

Other versions of this model

5 more in the same range

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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