Intel D850MVSE - Electrical Considerations; Power Consumption; Add-In Board Considerations; Power Usage

Technical Reference
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2.11 Electrical Considerations
2.11.1 Power Consumption
Table 50 lists voltage and current measurements for a computer that contains the
D850MD/D850MV board and the following:
• 1.7 GHz Intel Pentium 4 processor with a 256 KB cache
• 128 MB PC800 ECC RDRAM
• AGP 4X/2X video card
• 3.5-inch diskette drive
• 11.5 GB IDE hard disk drive
• 36X 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 98 SE desktop mode are measured at 640 x 480 x 256 colors and 60 Hz
refresh rate. AC watts are measured with the computer 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 for specification information).
Table 50. Power Usage
DC Current at:
Mode
AC Power
+3.3 V +5 V +12 V -12 V +5 VSB
Windows 98 SE ACPI S0 69 W 2.6 A 2.3 A 1.5 A 0 A 0.3 A
Windows 98 SE ACPI S1 63 W 2.5 A 2.3 A 1.4 A 0 A 0.3 A
Windows 98 SE ACPI S3 3 W 0 A 0 A 0 A 0 A 0.4 A
2.11.2 Add-in Board Considerations
The D850MD and D850MV 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 D850MD board (all four expansion slots filled), the total +5 V current draw
must not exceed 8 A.
• For a fully loaded D850MV board (all seven expansion slots filled), the total +5 V current
draw must not exceed 14 A.