All three dualies ship with a base 512MB of 400MHz DDR SDRAM, expandable to 8GB on the top two machines, and 4GB on the 2GHz model. The 2.7 and 2.3GHz Macs each ship with a 250GB Serial ATA hard drives and three PCI-X slots. The 2GHz machine has a 160GB unit and three vanilla PCI slots. The lower specced machines ship with a 128MB ATI Radeon 9600 graphics card; the 2.7GHz version with a 256MB ATI Radeon 9650. All three ship with a dual-layer DVD-R/CD-RW 'SuperDrive', with a DVD-R speed of 16x.

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