Intel D845GVFN Product Specification - Page 60

Electrical Considerations

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Intel Desktop Board D845GVFN Technical Product Specification 2.11 Electrical Considerations 2.11.1 DC Loading Table 37 lists the DC loading characteristics of the board. This data is based on a DC analysis of all active components within the board that impact its power delivery subsystems. The analysis does not include PCI add-in cards. Minimum values assume a light load placed on the board that is similar to an environment with no applications running and no USB current draw. Maximum values assume a load placed on the board that is similar to a heavy gaming environment with a 500 mA current draw per USB port. These calculations are not based on specific processor values or memory configurations but are based on the minimum and maximum current draw possible from the board's power delivery subsystems to the processor, memory, and USB ports. Use the datasheets for add-in cards, such as PCI, to determine the overall system power requirements. The selection of a power supply at the system level is dependent on the system's usage model and not necessarily tied to a particular processor speed. Table 37. DC Loading Characteristics Mode Minimum loading Maximum loading DC Power 190.00 W 286.00 W +3.3 V 5.00 A 11.00 A +5 V 11.00 A 15.00 A DC Current at: +12 V -12 V 9.00 A 0.03 A 13.00 A 0.10 A +5 VSB 0.60 A 1.40 A 2.11.2 Add-in Board Considerations The Desktop Board D845GVFN is designed to provide 2 A (average) of +5 V current for each addin board. The total +5 V current draw for add-in boards for a fully loaded Desktop Board D845GVFN (all three expansion slots filled) must not exceed 6 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 on the Desktop Board D845GVFN. Table 38. Fan Connector Current Capability Fan Connector Processor fan Front chassis fan Rear chassis fan Maximum Available Current 1.00 A 1.00 A 1.00 A 60

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Intel Desktop Board D845GVFN Technical Product Specification
60
2.11 Electrical Considerations
2.11.1
DC Loading
Table 37 lists the DC loading characteristics of the board.
This data is based on a DC analysis of
all active components within the board that impact its power delivery subsystems.
The analysis
does not include PCI add-in cards.
Minimum values assume a light load placed on the board that is
similar to an environment with no applications running and no USB current draw.
Maximum
values assume a load placed on the board that is similar to a heavy gaming environment with a
500 mA current draw per USB port.
These calculations are not based on specific processor values
or memory configurations but are based on the minimum and maximum current draw possible from
the board’s power delivery subsystems to the processor, memory, and USB ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system power
requirements.
The selection of a power supply at the system level is dependent on the system’s
usage model and not necessarily tied to a particular processor speed.
Table 37.
DC Loading Characteristics
DC Current at:
Mode
DC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
Minimum loading
190.00 W
5.00 A
11.00 A
9.00 A
0.03 A
0.60 A
Maximum loading
286.00 W
11.00 A
15.00 A
13.00 A
0.10 A
1.40 A
2.11.2
Add-in Board Considerations
The Desktop Board D845GVFN is 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 a fully loaded Desktop Board
D845GVFN (all three expansion slots filled) must not exceed 6 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 on the Desktop Board D845GVFN.
Table 38.
Fan Connector Current Capability
Fan Connector
Maximum Available Current
Processor fan
1.00 A
Front chassis fan
1.00 A
Rear chassis fan
1.00 A