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4GB RAM Memory for HP EliteBook 8440p Notebook Black Diamond Memory Module DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.com
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What RAM is compatible for Elitebook 8440p? - HP Support Community - 7269507
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8GB Kit (4GBx2) Upgrade for a HP - Compaq EliteBook 8440p System (DDR3 PC3-12800, Non-ECC, ) at Amazon.com
HP Elitebook 8440P 14.0 in Intel Core i5 520M 2.40 GHz 4 GB RAM 120 GB SSD Win11 | eBay
8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP EliteBook 8440p (WJ681AW#ABA) (Genuine A-Tech Brand) at Amazon.com
SOLVED: What RAM Memory I need for HP EliteBook 8440p? - HP EliteBook 8440p - iFixit