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84 Appendix A Specifications
Power Requirements for Devices You Can Connect
Expansion cards
 Combined maximum power available for 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 69) 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. The weight above is for a basic configuration and
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)
LL3218Q87.book Page 84 Wednesday, March 16, 2005 6:28 PM