Electrical Considerations; Power Consumption; Add-In Board Considerations; Power Usage - Intel D845HV Technical Product Specification

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

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
AC Power +3.3 V +5 V
163 W 11.5 A 4.0 A
26 W 4.7 A 0.008 A
2 W 0.0 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