CMS 32GB (2X16GB) DDR4 21300 2666MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Legion Y540 (15), Y540-15IRH, Y540-15IRH-PG0, Legion Y540 (17) - D39 at Amazon.com
Legion Y530: RAM upgrade and maximum supported memory - LenardGunda.com
Y540-15 Motherboard 5B20S44084 5B20S44083 FY521/FY522/FY519/FY520 NM-C372 For Legion Y540-15IRH-PG0
Lenovo Legion Y540 | Price, Specs and Reviews | Lenovo India
Amazon.com: Lenovo Legion Y540 2021 Gaming Laptop I 15.6" FHD IPS 144Hz I 9th Gen Intel 6-Core i7-9750H I 16GB DDR4 512GB SSD 1TB HDD I GeForce GTX 1660 Ti 6GB I