Chapter 4. Power Supply
Notes:
1. For each PCI connector, the maximum power consumption is rated at 25 watts for +5 V and +3.3 V
combined.
2. Maximum current cannot be supplied to all components at all times. System power and cooling are
designed to support the statistical RMS power load and typical combinations of adapters.
Note: Some adapters and hard disk drives draw more current than the recommended limits. These
adapters and drives can be installed in the system; however, the power supply will shut down if the
total power used exceeds the maximum power that is available.
Table 20. ISA-Bus Adapters (Per Slot)
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 2000 mA +5.0% to −4.0%
−5.0 V dc 100 mA ±10.0%
+12.0 V dc 175 mA +5.0% to −5.0%
−12.0 V dc 100 mA +10.0% to −9.0%
Table 21. 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 7600 mA +5.0% to −5.0%
+12 V dc 500 mA ±5.0%
−5.0 V dc 100 mA ±10.0%
Table 22. Typical AGP Adapter
Supply Voltage Maximum Current Regulation Limits
+3.3 V dc 7600 mA ±10.0%
Table 23. Internal 9.11 GB SCSI Drive
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 1085 mA (idle); 1133 mA (typical);
1300 (peak)
+5.0% to −5.0%
+12.0 V dc 850 mA (idle); 2050 mA (peak); 2711
mA (maximum)
+5.0% to −5.0%
Table 24. Keyboard Port
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 500 mA +5.0% to −4.0%
Table 25. USB Port
Supply Voltage Maximum Current Regulation Limits
+5.0 V dc 500 mA +5.0% to −4.0%
28 Technical Information Manual
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