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
Memory RAM | 2GB - HP - HPE HP Compaq 6820s - (OEM-# EM995AA, 406728-001) - 667MHz
1GB [1x1GB] Memory RAM Upgrade for the Compaq HP Business Notebook 6820s Laptops | eBay
Memory RAM | 4GB - HP - HPE HP Compaq 6820s - (OEM-# EM996AA) - 667MHz
4GB 2x2GB HP Compaq 6710b 6715b 6715s 6735s 6820s 6830s 6910p DDR2 Laptop RAM AB | eBay
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
1GB PC667 HP Compaq 6820s RAM Upgrade
Memory RAM | 4GB - HP - HPE HP Compaq 6820s - (OEM-# EM996AA) - 667MHz