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Introducing the Motherboard
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the 649-M2 motherboard. This motherboard is a high
performance, enhanced function motherboard that supports LGA775 socket for the
latest Intel Pentium 4/Celeron processors for high-end business or personal desktop
markets.
The motherboard incorporates the SiS649 Northbridge (NB) and SiS965/SiS965L
Southbridge (SB) chipsets. The SiS649 Northbridge chipset features the AGTL & AGTL+
compliant bus driver technology with integrated on-die termination to support Intel
Pentium 4 series processors up to FSB 800/533 MHz. The memory controller supports
DDR SDRAM only, supporting up to 2GB in maximum size with DDR400/333/266. It
can offer maximum memory bandwidth up to 3.2 GB/s under DDR 400. One 16-lane PCI
Express slot, intended for Graphics Interface, is fully compliant to the PCI Express Base
Specification revision 1.0a.
The SiS965/SiS965L Southbridges support Hi-Precision Event Timer (HPET) for Microsoft
Windows with multiple DMA bus architecture that supports isochronous request and
continuous packet transmission. It implements an EHCI compliant interface that provides
480Mb/s bandwidth for eight USB 2.0 ports, integrates AC’97 v2.3 compliant audio
controller that features a 6-channel audio speaker out and HSP v.90 modem support.
With PCI 2.3 specification compliant, this motherboard supports three PCI slots. The
Southbridge integrates a Serial ATA host controller with four onboard SATA ports (SiS965L
features two SATA ports) that is SATA v1.0 compliant, supporting Ultra DMA 150 and
LAN controller supporting 10/100Mbit/s ethernet. In addition, the Southbridge comes
with dual independent IDE channels, supporting PIO mode 0,1,2,3,4 and Multiword DMA
mode 0,1,2 and UltraDMA 133/100/66.
The 649-M2 motherboard is equipped with advanced full set of I/O ports in the rear panel,
including PS/2 mouse and keyboard connectors, COM1, LPT1, four USB ports, one
optional LAN port, one optional 1394 port, and audio jacks for microphone, line-in and
line-out.
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