Apple Xserve - Power Requirements for Devices You Can Connect

82 Appendix A
Power Requirements for Devices You Can Connect
Expansion cards
m Maximum power consumption by three PCI cards combined is 50 W (total for two 12-inch
cards and one 7-inch card).
m 12-inch PCI card slots
m Data width: 32 or 64 bits
m Frequency: 33 or 66 MHz
m Power: 3.3 V
m Length: 7 or 12 in.
m PCI/AGP card slot (AGP card requires adapter)
m Data width: 32 bits
m Frequency: 66 MHz
m Signaling: 3.3 V, PCI; 1.5 V of 3.3 V, AGP
m Length: 7 inches
FireWire devices
m The computer can provide up to 15 W total to all FireWire ports combined.
m Output voltage range: Approximately 13 to 30 V
m Output power range: Up to 15 W
USB devices
m Each of the computer’s built-in USB ports is allotted 500 mA.
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 77) with a new one purchased from an Apple-
authorized dealer.