How to Upgrade RAM in Your HP Laptop (with RAM underneath keyboard) - YouTube
How to remove replace or upgrade HP EliteBook 8440P RAM Memory modules - YouTube
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8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP EliteBook 2540p (XT930UT#ABA) (Genuine A-Tech Brand) at Amazon.com
16GB Memory HP EliteBook 845 G7 Notebook PC DDR4 3200MHz RAM Upgrade | eBay