CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® 3000 G550 Series 2958-Xxx; 59-031837; 59-034045 - A29 at Amazon.com
Upgrading memory and hard drive on Lenovo G570 – Inside my laptop
Lenovo Laptop Intel Core 2 Duo T6600 (2.20GHz) 3GB Memory 320GB HDD Intel GMA 4500MHD 15.6" Windows XP Professional preinstalled with Windows 7 Professional Upgrade Option G550(2958-A4U) - Newegg.com
Lenovo G550 Intel Core 2 Duo T6600 2.2 GHz 4 GB RAM 320 GB HDD 15.6" Win10 Pro | eBay
Lenovo G550 Series - Notebookcheck.net External Reviews