6GB -2GB+4GB Memory Ram Upgrade Apple iMac 8,1 Early 2008 2.66GHz Core 2 Duo 20"
Your iMac has two ram slots and the maximum upgrade is 6GB (2GB+4GB) . IMAC DETAILS. IMAC Identifier. INSIDE YOUR IMAC. Total Capacity: 6GB. Module Capacity: 2GB + 4GB. Core 2 Duo. Early 2008.