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8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP Probook 6550b (WZ241UT#ABA) (Genuine A-Tech Brand) at Amazon.com
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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
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Amazon.com: 2nd HDD SSD Hard Drive Caddy Tray Replacement for HP Elitebook 6930p 8440p 8530p 8540w 8730w 8740w 6530b 6730b 6440b 6450b 6550b, Internal Laptop DVD-ROM Optical Port Adapter to 2.5 Inch
![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](https://i5.walmartimages.com/asr/5fa0c662-4081-4bd8-8912-13f63df17a55.7378757f1034218315bfc526bf47d465.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
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
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OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 6550b (DDR3-10600) Laptop Memory at Amazon.com
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Memory RAM | 2GB - HP - HPE ProBook 6550b - (OEM-# AT912ET, AT912AA, 598856-002) - 1333MHz, Unbuffered, 1,5V
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