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
HP ProBook 6550B Intel Core i7-620M 2.67GHZ 4GB RAM NO HD NO CADDIE -- | eBay
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 INTEL CORE i5-540M 2.53GHZ 6GB RAM **NO HD/ NO CADDIE/ NO OS | eBay
How to remove and install new memory (RAM) in a HP ProBook 6550B - YouTube
HP PROBOOK 6550B CORE i5-M520 2.40GHZ 4GB RAM NO HD NO CADDIE | eBay
HP 6550b Memory upgrade.AVI - 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 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 Intel Core i5 M450 CPU @ 2.40GHz, 4GB RAM, 320GB HDD with Microsoft Windows 10 Professional and Microsoft Office 2010 Home & Business.
4 Go de mémoire RAM HP ProBook 6550b DDR3 (PC3-10600S) compatible RAM - Cdiscount Informatique
Review HP ProBook 6550b Notebook - NotebookCheck.net Reviews
Laptop HP ProBook 6550b Intel Core i5-M520 @ 2.40Ghz 4GB RAM 500GB HDD Windows 7 Professional 15.6" Grade A - ElectroBargoon
HP ProBook 6550b i5-M450 | 4GB RAM | Intel HD Graphics 1.5 | Built in Cam | Shopee Philippines