8GB -2x4GB Memory Ram Upgrade For 20" Apple iMac 9.1 2.0GHz Core2Duo Mid 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. CPU Model Number. Model Number.