![8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP Probook 4520s (WZ254UT#ABA) (Genuine A-Tech Brand) at Amazon.com](https://m.media-amazon.com/images/I/71z2T6h7ikL._AC_UF894,1000_QL80_.jpg "8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP Probook 4520s (WZ254UT#ABA) (Genuine A-Tech Brand) at Amazon.com")
8GB [2x4GB] DDR3-1333 RAM Memory Upgrade Kit for The Compaq HP Probook 4520s (WZ254UT#ABA) (Genuine A-Tech Brand) at Amazon.com
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A-Tech 8GB (2 x 4GB) RAM for HP PROBOOK 4520S | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
Arch Memory 4GB 204-Pin DDR3 1066 MHz So-dimm RAM for HP ProBook 4520s at Amazon.com
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HP ProBook 4520s review: HP ProBook 4520s - CNET
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