Add-On Computer Peripherals (AddOn) has been the exclusive supplier to Ingram Micro"s Memory Upgrades program since 1999. All AddOn memory is built to JEDEC Standards, to meet or exceed the Tier 1 OEM"s factory requirements. All our memory comes with a Lifetime warranty, and is 100% guaranteed compatible for the systems it is intended for.2Q84598. 4598. Addon - Memory Upgrades Addon - Memory Upgrades AddOncomputer dot com 2GB DDR2 667MHZ 200-pin SODIMM F/Lenovo Notebooks.