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Green circuit board with black memory chips, 260-pin SODIMM form factor, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM2048642666SO 16GB DDR4 2666 CL19 SODIMM memory upgrade

SKU CH-SWJE-ZBB8X

16 GB DDR4 2666 MHz SODIMM module upgrades Lenovo Legion Y540 laptops with CL19 timing and 1.2 V operation

  • Capacity16GB
  • Type260-Pin DDR4 SO-DIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Timing19-19-19
  • Voltage1.2V
  • 16 GB single-module upgrade for Lenovo Legion Y540
  • DDR4 2666 MHz CL19 timing for responsive multitasking
  • 2 V unbuffered SODIMM reduces power draw
  • 2Rx8 rank layout fits the two-slot 32 GB maximum
  • Guaranteed compatibility with 15-inch and 17-inch Y540 models

16GB DDR4 SODIMM for Lenovo Legion Y540

This 16GB DDR4 2666MHz SO-DIMM module is built for the Lenovo Legion Y540 15-inch and 17-inch laptops. It uses a 260-pin unbuffered non-ECC design running at 1.2V with CL19 timings. The single stick adds 16GB of system memory to compatible machines.

Upgrade from 8GB or fill the second slot

The Legion Y540 supports up to 32GB across two sockets, so this module replaces a smaller factory stick or occupies the empty slot. Installing a matched pair is recommended to enable dual-channel bandwidth, but mixing brands will cause all memory to run at the slowest installed speed.

Steady 1.2V operation under sustained load

Unbuffered DDR4 at 1.2V maintains consistent voltage during extended gaming or rendering sessions on the Y540. The 2Rx8 rank organisation and major-brand chipset deliver stable throughput without a heat spreader, relying on the laptop's internal airflow to manage thermals during long workloads.

Puntos fuertes

  • 16 GB single-module upgrade for Lenovo Legion Y540
  • DDR4 2666 MHz CL19 timing for responsive multitasking
  • 2 V unbuffered SODIMM reduces power draw
  • 2Rx8 rank layout fits the two-slot 32 GB maximum
  • Guaranteed compatibility with 15-inch and 17-inch Y540 models

Especificaciones

BrandComputer Memory Solutions
ModelCM2048642666SO
Capacity16GB
Type260-Pin DDR4 SO-DIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Timing19-19-19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemLenovo Legion Y540 (15), Y540-15IRH, Y540-15IRH-PG0, Legion Y540 (17)
Package Content1 Memory RAM Stick

Preguntas sobre este artículo

Will the 260-pin DDR4 SODIMM fit the memory slot in a Lenovo Legion Y540 15 or 17 laptop?

Yes, the module uses the standard 260-pin DDR4 SODIMM form factor required by the Legion Y540 series, so it seats directly into the laptop's SO-DIMM slot.

What is the correct way to seat this CL19 2666 MHz stick so the laptop recognises the full 16 GB?

Insert the module at the usual 30-degree angle until the gold contacts disappear, then press down firmly until both side clips click; the common error is stopping before the clips engage.

When would this 1.2 V unbuffered module need to be replaced or upgraded in a Legion Y540?

The system supports up to 32 GB across two slots, so you would add a second 16 GB stick later for maximum capacity or swap modules only if a fault develops.

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