A-Tech 16GB DDR5 4800 CL40 262-Pin SODIMM Laptop RAM

Direct DDR5 Upgrade for Lenovo 4X71K20069

This 16GB DDR5 4800 CL40 SODIMM replaces the IBM-Lenovo 4X71K20069 module in compatible laptops and all-in-one systems. It targets users who need a straightforward capacity increase without changing voltage or form factor. The 262-pin layout matches the factory slot exactly. AMD and Intel platforms that support DDR5 4800 can use this stick.

Standard 1.10V Unbuffered Build

The module runs at the DDR5 standard 1.10V and uses unbuffered, non-ECC major-brand chips in a 1Rx8 organisation. CL40 latency is native to the 4800 speed grade, so no manual timing changes are required. The 262-pin SO-DIMM edge connector fits the same keying as the original part, allowing a direct swap in the field.

Step Up from 8GB or Slower DDR5

Systems shipping with a single 8GB DDR5 4800 module gain immediate headroom for multitasking and larger datasets. The jump is worthwhile when the laptop has a free slot or when replacing a lower-capacity stick, provided the platform validates DDR5 4800 operation. Buyers needing ECC, registered buffering, or speeds above 4800 should look elsewhere.