OFFTEK 2GB Replacement Memory RAM Upgrade for HP-Compaq HP 6820s (DDR2-5300) Laptop Memory at Amazon.com
4GB 2X2GB RAM Memory for Compaq HP Business Notebooks Business Notebook 6730b Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-6400 800MHz Upgrade - Walmart.com
Memory RAM | 4GB - HP - HPE HP Compaq 6820s - (OEM-# EM996AA) - 667MHz
CMS 2GB (1X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Business Notebook 6715S, 6720S, 6735S, 6820S, 6910P, 8510P - A38 at Amazon.com
2GB PC667 HP Compaq 6820s RAM Upgrade
CMS 2GB (1X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Business Notebook 6715S, 6720S, 6735S, 6820S, 6910P, 8510P - A38 at Amazon.com
2GB RAM Memory for Compaq HP Business Notebooks Business Notebook nc6400 Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-5300 667MHz Upgrade - Walmart.com
HP Compaq 6820s CPU Upgrade - CPUs, Motherboards, and Memory - Linus Tech Tips
4GB 2X2GB RAM Memory for Compaq HP Business Notebooks Business Notebook 6730b Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-6400 800MHz Upgrade - Walmart.com
A-Tech 4GB KIT 2 x 2GB for HP Compaq 6000 Notebook HP 6250s 6510b 6515b