HP EliteBook 8540w RAM Upgrade and Install | Step-by-step DIY Tutorial - YouTube
HP EliteBook 8540p, Intel Core i5-1st Gen. CPU, 4GB RAM, 320GB HDD, 15.6 inch Display, NVIDIA QUADRO NVS 5100M 1GB DDR3, Win10Pro, Refurbished Laptop
4GB Team High Performance Memory RAM Upgrade Single Stick for HP - Compaq EliteBook 8540p (Quad Core Processors) Laptop. The Memory Kit Comes with Life Time Warranty. at Amazon.com