Apple Mac Pro (Early 2009) User Manual download pdf (Page 99)

Chapter 5 What’s Under the Hood 99

Â DVD±RW

Â DVD±R DL

USB Specifications

Â Support for Universal Serial Bus (USB) 2.0 and 1.1

Â Seven external USB Type A ports

Â Two USB 2.0 ports on the front

Â Three USB 2.0 ports on the back

Â Two USB 2.0 ports on the Apple Keyboard

Â Each USB port (front and rear) is on a separate 480 megabit-per-second (Mbit/s)

USB channel

Â 500 milliamperes (mA) available for a total of 1.5 A on the rear and 1.0 A on the front

FireWire Specifications

Â Four external FireWire ports: Two FireWire 800 ports (9-pin) on the front and two on

the back

Â Data transfer speed: 100, 200, 400, and 800 Mbit/s

Power

Â Output voltage: Approximately 12 V

Â Output power: Up to a maximum of 28 W for all 4 ports or 12 W for any one port

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Apple Mac Pro (Early 2009) User Manual Page 99