Mac Pro (Early 2008)

The original Mac Pro's main memory used 667 MHz DDR2 ECC FB-DIMMs; the early 2008 model used 800 MHz ECC DDR2 FB-DIMMS, the current Mac Pro uses 1066 MHz DDR3 ECC DIMMs for the standard models, and 1333 MHz DDR3 ECC DIMMs for systems configured with a 2.66 GHz or faster processors.In the original and 2008 models, these modules are installed in pairs, one each on two riser cards. The cards have 4 DIMM slots each, allowing a total of 32 GB of memory (4 × 8 GB) to be installed.The 2008 model had two PCI Express (PCIe) 2.0 expansion slots and two PCI Express 1.1 slots, providing them with up to 300 W of power in total.Bluetooth required an optional module in the Mid 2006 model, but is standard in the Early 2008 and newer models.