Chapter 1: Introduction
supply.
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 X5DL8-GG/X5DLR-8G2+/X5DLR-8G2 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 400W 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: Auxiliary 12v power (Processor Power) is necessary to sup- port Intel Xeon CPUs. Failure to provide this extra power will re- sult 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,
