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X9DRD-iF/LF Motherboard User’s Manual
1-5 ACPI Features
ACPI stands for Advanced Conguration and Power Interface. The ACPI specica-
tion denes a exible and abstract hardware interface that provides a standard
way to integrate power management features throughout a PC system, including
its 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 operating system-directed power management, ACPI also provides
a generic system event mechanism for Plug and Play, and an operating system-
independent interface for conguration control. ACPI leverages the Plug and Play
BIOS data structures, while providing a processor architecture-independent imple-
mentation that is compatible with Windows XP, 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 X9DRD-iF/LF motherboard accommodates 24-pin ATX power supplies. Al-
though most power supplies generally meet the specications required by the
CPU, some are inadequate. In addition, two 12V 8-pin power connections 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 4-pin and two 8-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 connectors are optional; however,
Supermicro recommends that these connectors also be plugged in for optimal power
delivery.
It is strongly recommended that you use a high quality power supply that meets ATX
power supply Specication 2.02 or above. It must also be SSI compliant. (For more
information, please refer to the website at http://www.ssiforum.org/). Additionally, in
areas where noisy power transmission is present, you may choose to install a line lter