8GB Kit [2x4GB] RAM Memory Upgrade for the Compaq HP Probook 6550b | eBay
How to remove and install new memory (RAM) in a HP ProBook 6550B - YouTube
Hp probook 6550B Intel core i5 @2.57ghz – HDD 320GB _ 4GB RAM Notebook PC – Wene Computers
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
RAM memory for HP ProBook 6550b
HP ProBook 6550b DDR3 12800Mhz SO-Dimm Laptop Ram in Pakistan
8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP Probook 6550b (WZ241UT#ABA) (Genuine A-Tech Brand) at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 6550b (DDR3-10600) Laptop Memory at Amazon.com
How to remove and install new memory (RAM) in a HP ProBook 6550B - YouTube
8GB (4GBx2) Team High Performance Memory RAM Upgrade For HP - Compaq ProBook 4311s 5220m 6550b 6555b Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
How to upgrade RAM memory in HP ProBook 6450b, 6455b laptop - YouTube