Electrical Considerations; Dc Loading; Add-In Board Considerations; Dc Loading Characteristics - Intel BLKD925XBCLK 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

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 D925XCV (all six expansion slots and the PCI Express x16 slot
filled) must not exceed 14 A.
•
A fully loaded Desktop Board D925XBC (all three expansion slots and the PCI Express x16
slot filled) must not exceed 8 A.
DC Power +3.3 V +5 V
200.00 W 3.30 A 10.00 A
300.00 W 6.00 A 14.00 A
Technical Reference
DC Current at:
+12 V -12 V
9.00 A 0.03 A
16.00 A 0.10 A
+5 VSB
0.80 A
1.40 A
85