How to remove and install new memory (RAM) in a HP ProBook 6550B - YouTube
HP ProBook 6550b 15.6" Widescreen Laptop - with Intel i5-520M 2.4GHz, 4GB RAM, 128GB SSD Hard Drive - Windows 7 Professional 64 - Used with FREE 3 Year Warranty provided by CPS. - Walmart.com
HP ProBook 6550b / 4GB RAM, 500GB HDD IntelCore i5, 2.5GHz, 15.5" / windows 10 / GRADE: A | Baudspace Warehouse
HP ProBook 6550b 15.6" Widescreen Laptop - with Intel i5-520M 2.4GHz, 4GB RAM, 128GB SSD Hard Drive - Windows 7 Professional 64 - Used with FREE 3 Year Warranty provided by CPS. - Walmart.com
OFFTEK 2 GB Replacement RAM Memory for HP Compaq ProBook 6550b Laptop Memory: Amazon.de: Computer & Accessories
HP Probook 6550b Intel Core i5 2.4 Ghz 8GB 500GB DvD Rewriter, Wifi, Camera 15.6 inch Screen, Intel HD Graphics Windows 10 pro 64bit - Online at Best Price in Singapore only on ElectronicsCrazy.sg
Solved: HP Delphi D40/Probook 6550B - HP Support Community - 8632576
Arch Memory 4GB 204-Pin DDR3 1333 MHz So-dimm RAM for HP ProBook 6550b at Amazon.com
8GB 2 X 4GB Memory for HP ProBook 6550b DDR3 PC3-10600 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
8GB Kit [2x4GB] RAM Memory Upgrade for the Compaq HP Probook 6550b | eBay
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 6550b (DDR3-10600) Laptop Memory at Amazon.com