Intel DG33BU Product Guide - Page 23

Desktop Board Features Wake from USB NOTE Wake from USB requires the use of a USB peripheral that supports Wake from USB. USB bus activity wakes the computer from an ACPI S3 state. Wake from PS/2 Keyboard/Mouse PS/2 keyboard/mouse activity wakes the computer from an ACPI S3 state. PME# Signal Wake-up Support When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S3, S4, or S5 state. WAKE# Signal Wake-up Support When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S2, S3, S4, or S5 state. ENERGY STAR* Qualified In 2007, the US Department of Energy and the US Environmental Protection Agency revised the ENERGY STAR requirements. Intel worked directly with these two governmental agencies to define the new requirements. Currently Intel Desktop Boards meet the new ENERGY STAR requirements. For information about the ENERGY STAR specifications, see: http://www3.intel.com/cd/channel/reseller/asmo-na/eng/337748.htm. Speaker A speaker is mounted on the Desktop Board. The speaker provides audible error code (beep code) information during the Power-On Self-Test (POST). Battery A battery on the Desktop Board keeps the values in CMOS RAM and the clock current when the computer is turned off. Go to page 54 for instructions on how to replace the battery. Real-Time Clock The Desktop Board has a time-of-day clock and 100-year calendar. The battery on the Desktop Board keeps the clock current when the computer is turned off. 23