HP ProBook 450 G2 Notebook Review - NotebookCheck.net Reviews
A-Tech 8GB Module for HP ProBook 450 G2 Laptop & Notebook Compatible DDR3/DDR3L PC3-12800 1600Mhz Memory Ram (ATMS322392B12351X1) at Amazon.com
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NeweggBusiness - HP Laptop ProBook Intel Core i5 4210U (1.70GHz) 4GB Memory 128 GB SSD Intel HD Graphics 4400 15.6" Windows 7 Professional 64-Bit with Windows 8.1 Pro License 450 G2 (J5P72UT#ABA)
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HP Probook 450 G3 15.6" Full HD (1920x1080) Business Laptop, Intel i5-6200U,8GB DDR4, 256GB