Memory RAM Upgrade for HP ProBook 6450b 4GB DDR3 SODIMM | eBay
HP ProBook 6450b 14.0" Silver Used Laptop - Intel Core i5 540M 1st Gen 2.53 GHz 6GB SODIMM DDR3 SATA 2.5" 120GB HDD DVD-RW Windows 10 Pro 64-Bit - Walmart.com
4GB (1X4GB) Memory Ram Compatible with Hp Probook 6450B (Ddr3) By CMS A34 - Computer Memory Solutions