2.11 Electrical Considerations
2.11.1 DC Loading
Table 37 lists the DC loading characteristics of the board.
Table 37.
DC Loading Characteristics
Mode
Minimum loading
Maximum loading
2.11.2 Add-in Board Considerations
The boards are designed to provide 2 A (average) of +5 V current for each add-in board. The total
+5 V current draw for add-in boards for the boards is as follows:
•
A fully loaded Desktop Board D865PERC (all six expansion slots and the AGP slot filled)
must not exceed 14 A.
•
A fully loaded Desktop Board D865PESO (all three expansion slots and the AGP slot filled)
must not exceed 8 A.
2.11.3 Fan Connector Current Capability
CAUTION
The processor fan must be connected to the processor fan connector, not to a chassis fan
connector. Connecting the processor fan to a chassis fan connector may result in onboard
component damage that will halt fan operation.
Table 38 lists the current capability of the fan connectors.
Table 38.
Fan Connector Current Capability
Fan Connector
Processor fan
Front chassis fan
Rear chassis fan
DC Power
+3.3 V
190.00 W
5.00 A
286.00 W
11.00 A
Maximum Available Current
1600 mA
800 mA
800 mA
DC Current at:
+5 V
+12 V
11.00 A
9.00 A
15.00 A
13.00 A
Technical Reference
-12 V
+5 VSB
0.03 A
0.60 A
0.10 A
1.38 A
77
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