Apple Computer iMac 20-inch 2.66 GHz Core 2 Duo (E8135) iMac 21.5-inch 2.5/2.7 GHz Core i5 (i5-2400S, i5-2500S) iMac 21.5-inch 2.8 GHz Core I7 (i7-2600S) Order Number MC978LL/A, MC309LL/A, MC812LL/A, BTO/CTO Model Number A1224, A1311 Part Name Optical Drive Manufacture Part Number AD-5960, GA32N, GA31N EMC Number EMC 2266, EMC 2428 EEE Code DFF0, DFF2, […]