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AirPort Extreme (802.11g/n) and Bluetooth 2.0+EDR can be installed at additional cost.



In the default configuration, one internal 3.5" bay is occupied by a hard drive and three are free, and one external 5.25" bay is occupied by a "SuperDrive" and the other is free. The no longer available Developer's Note also documented "two unpopulated 3 Gbps SATA buses for expansion".



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In the US (and many other countries), site sponsor



In Australia, site sponsor *The Mac Pro has four PCIe expansion slots (one double-wide 16-lane PCI Express slot is occupied by the NVIDIA GeForce 7300 GT in the default configuration, and three full-length PCI Express expansion slots are open). Apple also reports that the system has "configurable bandwidth that mechanically supports 16-lane cards [and supports] 300W combined max for all PCI Express slots."Also see: How does the Mac Pro allocate lanes for the PCIe bus? What configurations are possible?AirPort Extreme (802.11g/n) and Bluetooth 2.0+EDR can be installed at additional cost.In the default configuration, one internal 3.5" bay is occupied by a hard drive and three are free, and one external 5.25" bay is occupied by a "SuperDrive" and the other is free. The no longer available Developer's Note also documented "two unpopulated 3 Gbps SATA buses for expansion".Also see: How many PCI slots of what type are provided by each Mac Pro model? How do you install a PCIe card in the Mac Pro?In the US (and many other countries), site sponsor Other World Computing sells a wide variety of internal and external expansion options and hand-picked accessories ranging from internal PCIe cards to external storage, stands, keyboards, cables, adapters, and more for this Mac Pro In Australia, site sponsor Macfixit offers an extensive selection of external expansion options and accessories like docks, stands, chargers, keyboards, and security products (as well as some PCIe cards) for this Mac Pro