ECS 661GX/800-M7 (V3.0), Manual, Page: 7 / 95

1
Introducing the Motherboard
Chapter 1
Introducing the Motherboard
Introduction
Thank you for choosing the 661GX/800-M7 motherboard. This motherboard is a high
performance, 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. 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-channel of audio speaker out and HSP v.90 modem support. The SiS964
integrates a Serial ATA host controller that is SATA v1.0 compliant, support Ultra DMA
150. SiS964 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/800-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.