X550CA Notebook mainboard E1 E2 A4 CPU 2GB 4GB RAM For ASUS X550CA X550CC Y581C X550CL R510C X550C Laptop motherboard|Laptop Motherboard| - AliExpress
Asus X550CA RAM Replacement - iFixit Repair Guide
Asus X550CA RAM Replacement - iFixit Repair Guide
Asus X550ca-xx249h Laptop, Intel Core I5-3337u 1.8ghz, 4gb Ram, 750gb Hdd, 15.6" Led, 8x Super Multi With Double Layer, Intel Hd 4000, Webcam, Windows 8 64bit
Upgrading Asus X550C and CA Series Laptop RAM : 7 Steps - Instructables