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provide you with warnings when system temperature, CPU temperature, voltages
and fan speeds go beyond a predefi ned range.
1-5
ACPI Features
ACPI stands for Advanced Confi guration and Power Interface. The ACPI specifi ca-
tion defi nes a fl exible and abstract hardware interface that provides a standard
way to integrate power management features throughout a PC system, including
hardware, operating system and application software. This enables the system to
automatically turn on and off peripherals such as CD-ROMs, network cards, hard
disk drives and printers.
In addition to enabling operating system-directed power management, ACPI also
provides a generic system event mechanism for Plug and Play, and an operating
system-independent interface for confi guration control. ACPI leverages the Plug and
Play BIOS data structures, while providing a processor architecture-independent
implementation that is compatible with Windows 7, Windows Vista and Windows
2008 Operating Systems.
Slow Blinking LED for Suspend-State Indicator
When the CPU goes into a suspend state, the chassis power LED will start blinking
to indicate that the CPU is in suspend mode. When the user presses any key, the
CPU will "wake up" and the LED will automatically stop blinking and remain on.
1-6
Power Supply
As with all computer products, a stable power source is necessary for proper and
reliable operation. It is even more important for processors that have high CPU
clock rates.
The X9DBU-3F/X9DBU-iF motherboard accommodates 24-pin ATX power sup-
plies. Although most power supplies generally meet the specifi cations required
by the CPU, some are inadequate. In addition, two 12V 8-pin power connections
(JPW2/JPW3) and the 4-Pin Power Connector (JPW4) are also required to ensure
adequate power supply to the system. Your power supply must also supply 1.5A
for the Ethernet ports.
Warning: To avoid damaging your motherboard and components, please use a
power supply that supports a 24-pin, two 8-pin and one 4-pin power connectors. Be
sure to connect the 24-pin and the 8-pin power connectors to your power supply
for adequate power delivery to your system. The 4-pin power connector is optional;
however, Supermicro recommends that this connector also be plugged in for optimal
power delivery.
1-13
Chapter 1: Overview
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