Intel D845PT Product Specification - Page 82

Electrical Considerations

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Intel Desktop Board D845BG/D845PT Technical Product Specification 2.11 Electrical Considerations 2.11.1 Power Consumption Table 49 lists voltage and current measurements for a computer that contains the D845BG/D845PT board and the following: • 2.2 GHz Intel Pentium 4 processor with a 256 KB cache • 32 MB AGP card • 512 MB DDR SDRAM • 3.5-inch diskette drive • 10.2 GB IDE hard disk drive • 52 X 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 1024 x 768 x true color (32 bit) and 85 Hz refresh rate. AC watts are measured with the computer is 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 1.5 on page 19 for specification information). Table 49. Power Usage Mode ACPI S0 ACPI S1 ACPI S3 AC Power 56.1 W 44.9 W 3.9 W +3.3 V 4.210 A 2.604 A 0.004 A +5 V 0.175 A 0.128 A 0.003 A DC Current at: +12 V -12 V 1.234 A 0.75 A 1.230 A 0.75 A 0.003 A 0.004 A +5 VSB 0.316 A 0.260 A 0.411 A 2.11.2 Add-in Board Considerations The D845BG and D845PT 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 D845BG board (all seven expansion slots filled), the total +5 V current draw must not exceed 14 A. • For a fully loaded D845PT board (all four expansion slots filled), the total +5 V current draw must not exceed 8 A. 82

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Intel Desktop Board D845BG/D845PT Technical Product Specification
82
2.11 Electrical Considerations
2.11.1
Power Consumption
Table 49 lists voltage and current measurements for a computer that contains the
D845BG/D845PT board and the following:
•
2.2 GHz Intel Pentium 4 processor with a 256 KB cache
•
32 MB AGP card
•
512 MB DDR SDRAM
•
3.5-inch diskette drive
•
10.2 GB IDE hard disk drive
•
52 X 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 1024
x
768
x
true color (32 bit) and
85 Hz refresh rate.
AC watts are measured with the computer is 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 1.5 on page 19 for specification information).
Table 49.
Power Usage
DC Current at:
Mode
AC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
ACPI S0
56.1 W
4.210 A
0.175 A
1.234 A
0.75 A
0.316 A
ACPI S1
44.9 W
2.604 A
0.128 A
1.230 A
0.75 A
0.260 A
ACPI S3
3.9 W
0.004 A
0.003 A
0.003 A
0.004 A
0.411 A
2.11.2
Add-in Board Considerations
The D845BG and D845PT 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 D845BG board (all seven expansion slots filled), the total +5 V current draw
must not exceed 14 A.
•
For a fully loaded D845PT board (all four expansion slots filled), the total +5 V current draw
must not exceed 8 A.