CMS 16GB DDR4 21300 2666MHz SODIMM for Lenovo Y540 - Reliable Upgrade

In this review of the CMS 16GB DDR4 21300 2666MHz SODIMM module, the bottom line is simple: it is a straightforward, cost-effective memory upgrade for owners of supported Lenovo Legion Y540 models who need a clean way to boost multitasking and memory headroom. The module is a single 16GB non-ECC SODIMM that runs at 2666 MHz and is sold by Computer Memory Solutions with a lifetime exchange or repair warranty when purchased directly, so reliability and compatibility with listed Y540 SKUs are the main reasons to consider this upgrade.

Key Features

• Capacity: A single 16GB SODIMM provides a substantial memory increase for gaming laptops and heavy multitasking without replacing existing modules.
• Speed: DDR4-21300 at 2666 MHz offers responsive system performance and smoother application switching compared with slower memory.
• Form factor: The 260-pin SODIMM design is specifically suited to laptops such as the Lenovo Legion Y540 series for an easy physical fit.
• Compatibility guarantee: Computer Memory Solutions guarantees compatibility with the listed Lenovo models, reducing the risk of mismatch or boot issues.
• Voltage and timings: Standard 1.2V operation and CL19 timings keep power draw typical for modern laptop DDR4 modules while maintaining stable operation.
• Warranty: Lifetime exchange or repair warranty from the manufacturer provides added protection against manufacturing defects when purchased directly.

Who It's For

The CMS 16GB SODIMM is aimed at Lenovo Legion Y540 (15) and Y540 (17) owners who want a simple route to more memory for gaming, streaming, and content creation on a laptop with two SODIMM sockets. It is a good match for users running a 64-bit operating system who need more than 8GB or want to upgrade to a single 16GB module now and add another later.

Users who should look elsewhere include those needing ECC memory, desktop DIMM modules, or memory faster than 2666 MHz; also, buyers who require matched dual-module kits for guaranteed dual-channel performance may prefer purchasing a two-module kit instead of a single stick.

Pros & Cons

Pros

• Solid 16GB capacity that improves multitasking and modern game performance on supported laptops.
• 2666 MHz DDR4 speed balances performance and compatibility with the listed Lenovo models.
• Manufacturer warranty and compatibility guarantee reduce risk when upgrading.
• SODIMM 260-pin form factor fits laptop memory slots without modification.

Cons

• Single-module sales mean dual-channel performance depends on pairing with a matched module, so maximum memory bandwidth may require a second purchase.
• Product appearance may vary from pictures, which may concern buyers wanting a visual match to existing modules.

Specifications

Brand	Computer Memory Solutions
Capacity	16GB (1 x 16GB)
Memory Type	DDR4-21300 (2666 MHz) Non-ECC SODIMM
Pins	260-pin
Voltage & Timings	1.2V, CL19
Compatible Models	Lenovo Legion Y540 (15), Y540-15IRH, Y540-15IRH-PG0, Legion Y540 (17)
Warranty	Lifetime exchange or repair (when bought directly)

Our Verdict

The CMS 16GB DDR4 2666MHz SODIMM is a practical and well-matched upgrade for Lenovo Legion Y540 owners who need more memory without fuss; it delivers reliable capacity and compatible speed at a reasonable value, and the manufacturer's warranty adds useful peace of mind. Buyers seeking maximum dual-channel throughput should plan to install a matched second module, but for most users this single 16GB stick is an efficient way to extend laptop life and responsiveness.

Frequently Asked Questions

Will this module work with both 15 and 17 inch Legion Y540 laptops?
Yes. The manufacturer lists compatibility with Lenovo Legion Y540 (15) models and Legion Y540 (17) models in the product description.

Can I mix this module with an existing stick from another brand?
In most cases mixing manufacturers works, but all memory will run at the slowest installed module or CPU capability, so matched pairs are recommended for best performance.

Does this module include a warranty?
Yes. Computer Memory Solutions provides a lifetime exchange or repair warranty against manufacturing defects when purchased directly from the maker.