8GB -2x4GB Memory Ram Upgrade 20" Apple iMac 9.1 2.66GHz Core 2 Duo Early 2009
Your iMac has two ram slots and the maximum upgrade is 8GB (2X4GB). IMAC DETAILS. IMAC Identifier. INSIDE YOUR IMAC. Core 2 Duo. Kit Capacity: 8GB. Early 2009. CPU Model Number.