Intel D845HV Product Specification - Page 78

Electrical Considerations

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Intel Desktop Board D845HV/D845WN Technical Product Specification 2.11 Electrical Considerations 2.11.1 Power Consumption Table 50 lists voltage and current measurements for a computer that contains the D845HV/D845WN board and the following: • 1.7 GHz Intel Pentium 4 processor with a 256 KB cache • 256 MB SDRAM • 3.5-inch diskette drive • 20 GB IDE hard disk drive • 32X IDE CD-ROM drive This information is provided only as a guide for calculating approximate power usage with additional resources added. Values for the Windows 98SE desktop mode are measured at 640 x 480 x 256 colors and 60 Hz refresh rate. AC watts are measured with the computer is connected to a typical 250 W power supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.  NOTE Actual system power consumption depends upon system configuration. The power supply should comply with the recommendations found in the ATX / ATX12V Power Supply Design Guide, Version 1.1 (see Section 1.5 on page 18 for specification information). Table 50. Power Usage Mode ACPI S0 ACPI S1 ACPI S3 AC Power 163 W 26 W 2 W +3.3 V 11.5 A 4.7 A 0.0 A +5 V 4.0 A 0.008 A 0.0 A DC Current at: +12 V -12 V 7.6 A 1.0 A 0.750 A 0.038 A 0.0 A 0.0 A +5 VSB 0.200 A 0.164 A 0.394 A 2.11.2 Add-in Board Considerations The D845HV and D845WN 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 is as follows: • For a fully loaded D845HV board (all four expansion slots filled), the total +5 V current draw must not exceed 8 A. • For a fully loaded D845WN board (all seven expansion slots filled), the total +5 V current draw must not exceed 14 A. 78

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Intel Desktop Board D845HV/D845WN Technical Product Specification
78
2.11 Electrical Considerations
2.11.1
Power Consumption
Table 50 lists voltage and current measurements for a computer that contains the
D845HV/D845WN board and the following:
•
1.7 GHz Intel Pentium 4
processor with a 256 KB cache
•
256 MB SDRAM
•
3.5-inch diskette drive
•
20 GB IDE hard disk drive
•
32X IDE CD-ROM drive
This information is provided only as a guide for calculating approximate power usage with
additional resources added.
Values for the Windows 98SE desktop mode are measured at 640
x
480
x
256 colors and 60 Hz
refresh rate.
AC watts are measured with the computer is connected to a typical 250 W power
supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.
NOTE
Actual system power consumption depends upon system configuration.
The power supply should
comply with the recommendations found in the ATX / ATX12V Power Supply Design Guide,
Version 1.1 (see Section 1.5 on page 18 for specification information).
Table 50.
Power Usage
DC Current at:
Mode
AC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
ACPI S0
163 W
11.5 A
4.0 A
7.6 A
1.0 A
0.200 A
ACPI S1
26 W
4.7 A
0.008 A
0.750 A
0.038 A
0.164 A
ACPI S3
2 W
0.0 A
0.0 A
0.0 A
0.0 A
0.394 A
2.11.2
Add-in Board Considerations
The D845HV and D845WN 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 is as follows:
•
For a fully loaded D845HV board (all four expansion slots filled), the total +5 V current draw
must not exceed 8 A.
•
For a fully loaded D845WN board (all seven expansion slots filled), the total +5 V current
draw must not exceed 14 A.