Supermicro SUPER P4SS8, Руководство пользователя

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Chapter 1: Introduction
1-17
Introduction
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 SUPER P4SS8/P4SSE accommodates ATX power supplies. Although
most power supplies generally meet the specifications required by the CPU,
some are inadequate. You should use one that will supply at least 300W of
power - an even higher wattage power supply is recommended for high-
load configurations. Also your power supply must provide a +5V standby
voltage that supplies at least 720 mA of current. In addition, 1.5A is needed
for LAN1 and LAN2.
NOTE: Secondary 12v ATX power (at J50) is necessary to support
Intel Xeon CPUs. Failure to provide this extra power will result in
the CPUs becoming unstable after only a few minutes of operation.
See Section 2-5 for details on connecting the power supply cables.
It is strongly recommended that you use a high quality power supply that
meets ATX power supply Specification 2.02 or above. Additionally, in ar-
eas where noisy power transmission is present, you may choose to install
a line filter to shield the computer from noise. It is recommended that you
also install a power surge protector to help avoid problems caused by
power surges.
1-7 Super I/O
The disk drive adapter functions of the Super I/O chip include a floppy disk
drive controller that is compatible with industry standard 82077/765, a data
separator, write pre-compensation circuitry, decode logic, data rate selec-
tion, a clock generator, drive interface control logic and interrupt and DMA
logic. The wide range of functions integrated onto the Super I/O greatly
reduces the number of components required for interfacing with floppy disk
drives. The Super I/O supports 360 K, 720 K, 1.2 M, 1.44 M or 2.88 M disk
drives and data transfer rates of 250 Kb/s, 500 Kb/s or 1 Mb/s.It also
provides two high-speed, 16550 compatible serial communication ports
(UARTs), one of which supports serial infrared communication. Each UART
includes a 16-byte send/receive FIFO, a programmable baud rate generator,
complete modem control capability and a processor interrupt system.