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82 Appendix A Specifications
Power Requirements for Devices You Can Connect
Expansion cards
• Combined maximum power consumption by the AGP and PCI cards is 90 W.
USB devices
• Each of the computer’s built-in USB ports is allotted 500 mA.
FireWire devices
• The computer can provide up to 15 W total to the FireWire ports.
System Clock and Battery
• CMOS custom circuitry with long-life lithium battery. You can replace the computer’s
battery (see “Replacing the Battery” on page 67) with a new one purchased from an
Apple Authorized Reseller.
Dimensions and Operating Environment
Dimensions
• Weight: 17.84 kg (39.32 lbs.)
Weight depends on configuration. Weight above includes basic configuration: a
uniprocessor, an optical drive and one hard disk drive. Weight may be greater if
optional devices are installed.
• Height: 511 mm (20.12 in.)
• Width: 206 mm (8.11 in.)
• Depth: 475 mm (18.70 in.)
Operating environment
• Operating temperature: 10° to 35° C (50° to 95° F)
• Storage temperature: –40° to 47° C (–40° to 116° F)
• Relative humidity: 5% to 95% (noncondensing)
• Altitude: 0 to 3048 meters (0 to 10,000 feet)