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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
X550CA I5-3337 CPU 4GB RAM motherboard for ASUS X550CC R510C Y581C X550C X550CL Laptop mainboard X550CA motherboard test 100% ok - Newegg.com
How to upgrade Ram on Asus X550 Series (X550LB) - YouTube
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