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Introducing the Motherboard
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the 661GX-M7 motherboard. This motherboard is a high perfor-
mance, enhanced function motherboard that supports LGA775 Socket for latest Pentium 4/
Celeron Processors.
The motherboard incorporates the SiS661GX Northbridge (NB) and SiS964 Southbridge
(SB) chipsets. The SiS661GX Northbridge chipset features the AGTL & AGTL+ compliant
bus driver technology with integrated on-die termination to support Intel Pentium 4 series
processors with FSB 800 MHz (by overclocking)/533 MHz. The memory controller
supports DDR only. It can offer bandwidth up to 3.2 GB/s under DDR400 to sustain the
bandwidth demand from host processors. One AGP interface supports AGP 3.0 including
8X/4X data transfers and 8X/4X fast writes protocol.
The SiS964 Southbridge supports Hi-Precision Event Timer (HPET) for Microsoft Win-
dows with multiple DMA bus architecture that supports isochroous 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-channels of audio speaker out and HSP v.90 modem support. The SiS964
integrates a Serial ATA host controller that is SATA v1.0 compliant, supporting Ultra DMA
150. SiS964 also provides dual independent IDE channels and each of them support PIO
mode 0,1,2,3,4 and multiword DMA mode 0,1,2 and UltraDMA 133/100/66.
The 661GX-M7 motherboard is equipped with advanced full set of I/O ports in the rear
panel, including PS/2 mouse and keyboard connectors, COM1, LPT1, VGA, four USB ports,
one optional LAN port, and audio jacks for microphone, line-in and line-out.
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