operating system mac os x 10.4 (tiger) software included ilife '06 iwork '06 apple care till the 29th sep. '09 processor two 3.0ghz dual-core intel xeon memory 16gb (8 x 2gb) hard drive – bay 1 500gb 7200-rpm serial ata 3gb/s hard drive – bay 2 500gb 7200-rpm serial ata 3gb/s hard drive – bay 3 500gb 7200-rpm serial ata 3gb/s hard drive – bay 4 500gb 7200-rpm serial ata 3gb/s graphics ati radeon x1900 xt 512mb (2 x dual-link dvi) optical drive two 16x superdrives wireless options both bluetooth 2.0+edr and airport extreme