CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Probook 4545S 1333Mhz - A13 at Amazon.com
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Arch Memory 8GB 204-Pin DDR3 1600 MHz So-dimm RAM for HP ProBook 4540s at Amazon.com
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A-Tech 8GB RAM for HP PROBOOK 4540S | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Module at Amazon.com
OFFTEK 8GB Replacement Memory RAM Upgrade for HP-Compaq ProBook 4540s (DDR3-10600) Laptop Memory at Amazon.com
HP ProBook 4540s - Intel Core i3 3110M / 2.4 GHz - Win 8 64-bit - HD Graphics 4000 - 4 GB RAM - 320 GB HDD - DVD SuperMulti - 15.6" HD anti-glare 1366 x 768 (HD) - brushed aluminum - Walmart.com
