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