HP EliteBook - 8540p i5 540M, 4GB DDR3, 250GB HDD, WIN7 Home 15.6" Widescreen, DVD-RW, NVIDIA 1600x900 With A/C Adapter
HP EliteBook 8540P 15.6" Standard USED Laptop - Intel Core i5 540M 1st Gen 2.53 GHz 8GB SODIMM DDR3 SATA 2.5" 500GB HDD DVD-RW Windows 10 Pro 64-Bit - Walmart.com
How to upgrade RAM memory in HP EliteBook 8540w laptop - YouTube