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Two green laptop memory sticks with black chips and gold contacts

Crucial

Crucial CT2K16G4SFD8266 32GB (2 x 16GB) DDR4 2666MHz CL19 laptop RAM

SKU CH-QFQ2-9C90G MPN CT2K16G4SFD8266

32 GB kit of two 16 GB DDR4 2666 MHz CL19 SO-DIMMs running at 1.2 V for faster bandwidth and lower power draw

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered

Capacity 32GB (2 x 16GB)

  • 32 GB total capacity for heavy multitasking
  • DDR4 2666 MT/s speed boosts data throughput
  • CL19 latency with 1.2 V operation saves power
  • 260-pin SO-DIMM fits standard laptop slots
  • 100 % factory tested for reliable operation

Capacity and form factor

This kit provides 32GB of DDR4 laptop memory as two 16GB modules. Each stick uses the 260-pin SO-DIMM form factor designed for notebook slots. The memory runs at 2666 MT/s with CL19 timings at 1.20V.

Unbuffered non-ECC design

The modules are unbuffered and non-ECC, matching the requirements of most consumer laptop platforms. Dual-rank x8 organisation allows the density needed for 16GB per module. No heat spreader is included, keeping the profile low for tight chassis.

DDR3 bottleneck and voltage limit

The DDR4 standard replaces DDR3, which has been a limiting factor since 2007. Operating at 1.2V instead of 1.5V reduces voltage by 20% and can lower overall power draw by up to 40%. Systems that only accept DDR3 cannot use these modules.

How it compares

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

Price $110.99
Pricier than about 63% of the 2,079 comparable items (median $70.99).
Total capacity 32 GB (2 × 16 GB)
Higher than about 80% of the 1,886 comparable items (median 16 GB).
Price per GB $3.47 per GB
Cheaper than about 87% of the 1,886 comparable items (median $5.94 per GB).

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Specifications

Product
Brand nameCrucial
Model nameCT2K16G4SFD8266
Total capacity32 GB (2 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Size & build
Shipping weight0.08 kg
Package size174 × 116 × 11 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the modules need a heat spreader added later to handle sustained loads?

The kit ships without a heat spreader; DDR4 SO-DIMMs at 1.20 V run cool enough in typical laptop chassis that extra cooling is not required.

What limit appears first when the memory runs at 2666 MT/s for long periods?

The CAS latency of CL19 (19-19-19 timing) sets the response-speed ceiling before bandwidth or voltage become constraints.

How much power and heat will the 32 GB kit draw during all-day use?

Operating at 1.20 V, the dual-rank modules consume up to 40 % less power than DDR3 at 1.5 V, reducing both heat output and battery drain.

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