661-4674 Apple Logic Board 2.4 Ghz for Imac Intel Core 2 Duo 20" Early 2008 820-2223 Apple iMac Logic Board 661-4674 A1224 MB323LL/A with Intel Core 2 Duo 2.4GHz CPU Apple iMac Logic Board 661-4674 A1224 MB323LL/A with Intel Core 2 Duo 2.4GHz CPU