Their configurator is how I answer this one.
i have a emachines 420 - specs http://www.dealtime.co.uk/xPF-E_Machines_EMACHINES_RECON_420_Reconditioned_Celeron_2_6_GHz
i looked on hte BIOS, and cannot find the expandable memory - meaning the most memory i can expand my comptuer to!
does anyone know what it is on this computer??!! HELP! thanks