Electrical Considerations; Power Consumption; Add-In Board Considerations; Power Usage - Intel D845PEBT2 Specification

2.11 Electrical Considerations

2.11.1 Power Consumption

Table 55 lists voltage and current measurements for a computer that contains the Desktop Board
D845PEBT2 and the following:
•
2.8 GHz Intel Pentium 4 processor with a 512 KB cache
•
32 MB AGP card
•
512 MB DDR 266 SDRAM
•
3.5-inch diskette drive
•
10 GB IDE hard disk drive
•
12X IDE DVD/40X CD-ROM drive
•
†
IDE Zip drive
This information is provided only as a guide for calculating approximate power usage with
additional resources added.
Values for the Windows XP Professional desktop mode are measured at 32-bit colors, 75 Hz
refresh rate, and screen resolution of 800 by 600 pixels. AC watts are measured with the computer
connected to a typical 300 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 1.4 on page 17 for specification information).
Table 55.

Power Usage

Mode
ACPI S0
ACPI S1
ACPI S3
ACPI S5

2.11.2 Add-in Board Considerations

The Desktop Board D845PEBT2 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
D845PEBT2 (all five expansion slots and the AGP slot filled) must not exceed 12 A.
DC Current at:
AC Power
+3.3 V
57.00 W 7.02 A
56.45 W 6.89 A
4.9 µA
3.34 W
5.0 µA
3.00 W
+5 V +12 V -12 V
596 mA 1082.3 mA 12.4 mA
540 mA 1024.8 mA 12.3 mA
269.7 µA 325.6 µA
3.1 mA
3.8 µA
3.1 mA
Technical Reference
+5 VSB
288.0 mA
163.3 mA
363.6 mA
56.8 µA
298.2 mA
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