Apple Mac Pro (Early 2008) - Manual (Page 89)

Chapter 5 What’s Under the Hood 89
 DVD+R DL
USB Specifications
 Support for Universal Serial Bus (USB) 2.0 and 1.1
 Seven external USB Type A ports
 Two USB 2.0 ports on the front
 Three USB 2.0 ports on the back
 Two USB 2.0 ports on the Apple Keyboard
 Each USB port (front and rear) is on a separate 480 megabit-per-second (Mbit/s)
USB channel
 500 milliamperes (mA) available for a total of 1.5 A on the rear and 1.0 A on the front
FireWire Specifications
 Support for FireWire 400 and FireWire 800
 Four external FireWire ports: one FireWire 400 port (6-pin) and one FireWire 800 port
(9-pin) on both the front and back
 Data transfer speed:
 FireWire 400: 100, 200, and 400 Mbit/s
 FireWire 800: 100, 200, 400, and 800 Mbit/s
Power
 Output voltage: Approximately 12 V
 Output power: Up to a maximum of 28 W for all 4 ports or 12 W for any one port