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1 System overview
4
Note: The DDR SDRAM module should work under 3.3 volts only;
5-volt memory devices are not supported.
The mainboard supports 266 MHz DDR-SDRAM (PC-2100) module.
System chipsets
VIA Pro266T chipset
The VIA Pro266T chipset was specifically designed to meet the needs of
high performance systems. It consists of two components: VT8653
(north bridge) and VT8233 (south bridge).
• VT8653 (north bridge) provides the host interface, memory system
control interface, PCI interface, and AGP interface to boost
graphics performance.
• VT8233 (south bridge) integrates super I/O functions like keyboard
and mouse interface, floppy disk controller, advanced digital data
separator, two compatible serial ports (UARTs), one parallel port,
on-chip 12 mA AT bus drivers, one floppy direct drive support, and
Intelligent Power Management (IPM) support.
SCSI subsystem
The dual-channel AIC-7899 single-chip host adapter delivers Ultra
160/m SCSI data transfer rates which double the Ultra-2 SCSI data
transfer rate of up to 160 MByte/s. With two channels, it delivers a
total of 320 MByte/s bandwidth. In addition, the AIC-7899 features a
66 MHz, 64-bit PCI interface that supports zero wait-state memory
which also operates on 33 MHz, 32-bit PCI buses. It supports up to 15
devices on a 12-meter cable (or 25 meters in a point-to-point
configuration), making it ideal for both clustering and RAID
configurations.
AA G500.book Page 4 Thursday, September 13, 2001 6:56 PM