All Mac Pro configurations include:
Two Dual-Core Intel Xeon “Woodcrest” microprocessors, eight fully buffered DIMM slots, one double-wide PCI Express graphics slot, three full-length PCI Express expansion slots, four hard drive bays, two optical drive bays, five USB 2.0 ports, two FireWire 400 ports, two FireWire 800 ports, dual Gigabit Ethernet ports, optical digital audio input and output, analog stereo line-input and line-output, and a headphone minijack.