What Is Maximum Ram Supported By Hp EliteBook 8540P Laptop - HP Support Community - 6534769
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
Hp Elitebook 8540P Intel i5-560M @2.53GHz 4GB RAM No HDD/OS Read! | eBay
CMS 4GB (1X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Elitebook 8540P Notebook - A30 at Amazon.com
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Elitebook 8540W Mobile Workstation - A13 at Amazon.com