How to upgrade Ram on Asus X550 Series (X550LB) - YouTube
ASUS - The ASUS X550LB Notebook features a timeless design with incredible performance - Featuring a Core i7 CPU and NVIDIA 740M, streamline your computing experience with the X550LB today: http://bit.ly/1h5aUtt
ASUS X550LB-DS71 Optical Drive Replacement - iFixit Repair Guide
Refurbished Grade A1 Asus X550LB Core i5 4GB 750GB 15.6 inch DVDSM FreeDOS Laptop with NVIDIA 2GB Graphics - Laptops Direct