Technical information

Chapter 4. Power Supply
Component Outputs
The power supply provides separate voltage sources for the system board and internal storage devices.
The following tables show the approximate power that is provided for specific system components. Many
components draw less current than the maximum shown.
Note: For each PCI connector, the maximum power consumption is rated at 25 watts for +5 V and
+3.3 V combined.
Table 22. System Board
Supply Voltage Maximum Current Regulation Limits
+3.3 V dc 3000 mA +5.0% to −4.0%
+5.0 V dc 4000 mA +5.0% to −4.0%
+12.0 V dc 25.0 mA +5.0% to −5.0%
−12.0 V dc 25.0 mA +10.0% to −9.0%
Table 23. Keyboard Port
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 275 mA +5.0% to −4.0%
Table 24. Auxiliary Device Port
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 300 mA +5.0% to −4.0%
Table 25. ISA-Bus Adapters (Per Slot)
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 4500 mA +5.0% to −4.0%
−5.0 V dc 200 mA +5.0% to −5.0%
+12.0 V dc 1500 mA +5.0% to −5.0%
−12.0 V dc 300 mA +10.0% to −9.0%
Table 26. PCI-Bus Adapters (Per Slot)
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 5000 mA +5.0% to −4.0%
+3.3 V dc 5000 mA +5.0% to −4.0%
Chapter 4. Power Supply 21