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Asus X540L Disassembly for hard disk replacement or memory upgrade - YouTube
Amazon.com: Memoria RAM de 8 GB 1 x 8GB 4 Asus X Series Notebook x540la, x554lj-xx1153d by cms A8 : Electrónica
ASUS X540 - Tech Specs|Laptops For Home|ASUS Global
Asus X540L
Can I upgrade my laptop RAM (ASUS X540L) from 8GB to a 12 or even 16GB? - Quora
CMS 8GB (1X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Asus/Asmobile® X Series Notebook X540LA, X554LJ-XX1153D - A8 at Amazon.com
A-Tech 8GB Module for ASUS X540LA Laptop & Notebook Compatible DDR3/DDR3L PC3-12800 1600Mhz Memory Ram (ATMS393746B12351X1) at Amazon.com