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Super C9X299-PGF-L/-RPGF-L User's Manual
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 where
noisy power transmission is present.
The C9X299-PGF-L/-RPGF-L motherboard accommodates a 24-pin ATX power supply.
Although most power supplies generally meet the specifications required by the CPU, some
are inadequate. In addition, one 12V 8-pin power connection is also required to ensure
adequate power supply to the system. Also, your power supply must supply 1.5A for the
Ethernet ports.
Warning: To avoid damaging the power supply or the motherboard, be sure to use a
power supply that contains a 24-pin and an 8-pin power connector. Be sure to connect
the power supply to the 24-pin power connector (JPW1), and the 8-pin power connector
(JPW2) on the motherboard. Failure in doing so may void the manufacturer warranty
on your power supply and motherboard.
It is strongly recommended that you use a high quality power supply that meets ATX power
supply Specification 2.02 or later. It must also be SSI compliant.
1.7 Serial Header
The C9X299-PGF-L/-RPGF-L motherboard supports one serial communication connection.
The COM header can be used for input/output. The UART provides legacy speeds with a
baud rate of up to 115.2 Kbps as well as an advanced speed with baud rates of 250 K, 500
K, or 1 Mb/s, which support high-speed serial communication devices.
1.8 Super I/O
The Super I/O supports one high-speed, 16550 compatible serial communication port (UART).
Each UART includes a 16-byte send/receive FIFO, a programmable baud rate generator,
complete modem control capability and a processor interrupt system. The UART provides
legacy speed with a baud rate of up to 115.2 Kbps as well as an advanced speed with baud
rates of 250 K, 500 K, or 1 Mb/s, which support higher speed modems.
The Super I/O provides functions that comply with Advanced Configuration and Power Interface
(ACPI), which includes support of legacy and ACPI power management through an SMI or
SCI function pin. It also features auto power management to reduce power consumption.
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