Intel D845PEBT2 Product Specification - Page 79

Electrical Considerations

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Technical Reference 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 DC Current at: AC Power +3.3 V +5 V 57.00 W 7.02 A 596 mA 56.45 W 6.89 A 540 mA 3.34 W 4.9 µA 3.1 mA +12 V 1082.3 mA 1024.8 mA 269.7 µA ACPI S5 3.00 W 5.0 µA 3.1 mA 3.8 µA -12 V 12.4 mA 12.3 mA 325.6 µA 56.8 µA +5 VSB 288.0 mA 163.3 mA 363.6 mA 298.2 mA 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. 79

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Technical Reference
79
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
DC Current at:
Mode
AC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
ACPI S0
57.00 W
7.02 A
596 mA
1082.3 mA
12.4 mA
288.0 mA
ACPI S1
56.45 W
6.89 A
540 mA
1024.8 mA
12.3 mA
163.3 mA
ACPI S3
3.34 W
4.9
µ
A
3.1 mA
269.7
µ
A
325.6
µ
A
363.6 mA
ACPI S5
3.00 W
5.0
µ
A
3.1 mA
3.8
µ
A
56.8
µ
A
298.2 mA
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.