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Technical Reference
53
2.11 Electrical Considerations
2.11.1 Add-in Board Considerations
The board is designed to provide 2 A (average) of +5 V current for an add-in board in the PCI slot.
2.11.2 Power Consumption
Table 35 lists voltage and current specifications for a computer that contains the board and the
following:
• 550E MHz Intel Pentium III processor with a 256 KB cache
• 256 MB SDRAM
• 6.2 GB IDE hard disk drive
• Toshiba Mobile 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 desktop mode are measured at 640 x 480 x 256 colors and 60 Hz
refresh rate. AC watts are measured with a typical 145 W power supply, nominal input voltage
and frequency, with true RMS wattmeter at the line input.
Table 35. Power Usage
DC Amps at:
Mode AC Watts +3.3 V +5 V +12 V -12 V +5 VSB
Windows 98 ACPI S0 46 W 1.90 A 2.23 A 0.2 A -0.02 A 0.17 A
Windows 98 ACPI S1 22 W 1.37 A 0.38 A 0.2 A -0.02 A 0.143 A
Windows 98 ACPI S3 1 W 0.0 A 0.0 A 0.0 A 0.0 A 0.13 A
Windows 98 ACPI S5 1 W 0.0 A 0.0 A 0.0 A 0.0 A 0.11 A