Intel WX58BP Product Guide - Page 20

Intel® Workstation Board WX58BP Product Guide  ENERGY STAR capable Software Support ACPI ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the Board requires an operating system that provides full ACPI support. Hardware Support Power Connectors ATX12V-compliant power supplies can turn off the computer power through system control. When an ACPI-enabled computer receives the correct command, the power supply removes all non-standby voltages. When resuming from an AC power failure, the computer returns to the power state it was in before power was interrupted (either on or off). You can set the computer's response by using the Last Power State feature in the BIOS Setup program's Boot menu. The Board has three power connectors. See Figure 26 on page 50 for the location of the power connectors. Fan Headers The function/operation of the fans is as follows:  The fans are on when the computer is in the ACPI S0 state.  The fans are off when the computer is in the ACPI S3, S4, or S5 state.  Each fan header is wired to a tachometer input of the hardware monitoring and control device.  All fan headers support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed.  All fan headers have a +12 V DC connection. The Board has a 4-pin processor fan header, one 4-pin and two 3-pin chassis fan headers, and one 3-pin IOH fan header. LAN Wake Capabilities CAUTION For LAN wake capabilities, the 5-V standby line for the power supply must be capable of delivering adequate +5 V standby current. Failure to provide adequate standby current when using this feature can damage the power supply. 20