Intel D845GBV Product Supplement Document for the Intel Desktop Board D845GBV - Page 28

Electrical Considerations

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Product Supplement Document for the Intel Desktop Board D845GBV 2.6 Electrical Considerations 2.6.1 Power Consumption Table 21 lists voltage and current measurements for a computer that contains the Desktop Board D845GBV and the following: • 2.0 GHz Intel Pentium 4 processor with a 512 KB cache • 512 MB DDR SDRAM • 3.5-inch diskette drive • 10 GB IDE hard disk drive • 40X 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† XP 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 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. Table 21. Power Usage Mode ACPI S0 ACPI S1 ACPI S3 AC Power 61.0 W 53.9 W 4.3 W +3.3 V 3.02 A 2.91 A 0.0 A +5 V 0.12 A 0.11 A 0.0 A DC Current at: +12 V -12 V 0.99 A 0.014 A 0.68 A 0.014 A 0.0 A 0.0 A +5 VSB 0.22A 0.16 A 0.45 A 2.6.2 Add-in Board Considerations The Desktop Board D845GBV is designed to provide 2 A (average) of +5 V current for each addin board. For a fully loaded Desktop Board D845GBV (all six expansion slots filled), the total +5 V current draw must not exceed 14 A. 28

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Product Supplement Document for the Intel Desktop Board D845GBV
28
2.6 Electrical Considerations
2.6.1
Power Consumption
Table 21 lists voltage and current measurements for a computer that contains the Desktop Board
D845GBV and the following:
•
2.0 GHz Intel Pentium 4
processor with a 512 KB cache
•
512 MB DDR SDRAM
•
3.5-inch diskette drive
•
10 GB IDE hard disk drive
•
40X 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
†
XP 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 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.
Table 21.
Power Usage
DC Current at:
Mode
AC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
ACPI S0
61.0 W
3.02 A
0.12 A
0.99 A
0.014 A
0.22A
ACPI S1
53.9 W
2.91 A
0.11 A
0.68 A
0.014 A
0.16 A
ACPI S3
4.3 W
0.0 A
0.0 A
0.0 A
0.0 A
0.45 A
2.6.2
Add-in Board Considerations
The Desktop Board D845GBV is designed to provide 2 A (average) of +5 V current for each add-
in board.
For a fully loaded Desktop Board D845GBV (all six expansion slots filled), the total
+5 V current draw must not exceed 14 A.