ECS 661GX/800-M7 (V3.0), Manual, Page: 8 / 95

2
Introducing the Motherboard
Feature
The SiS661GX Northbridge (NB) and SiS964 Southbridge (SB) chipset are based on an
innovative and scalable architecture with proven reliability and performance.
SiS661GX(NB)
• Supports 12 outstanding transactions and out-of-order
completion
• Accommodates high throughput SiS MuTIOL 1G intercon-
necting to SiS964 MuTIOL 1G media I/O with bi-directional
16-bit data bus to perform 1GB/s bandwidth in 133 MHz x
4 mode
• Supports AGP 8X/4X Interface with Fast Write Transaction
• Supports DDR400/333/266 SDRAM
• Support High Performance 256bit & High Quality 3D/2D
Graphics Accelerator
SiS964(SB)
Chipset
• Concurrent servicing of all DMA Devices: Dual IDE Control-
lers, SATA Controller, three USB 2.0/1.1 host controller,
LAN MAC Controller and Audio/Modem DMA Controller
• Compliant with PCI 2.3 specificaiton
• Compliant with Serial ATA 1.0 specification, supports power
saving mode
• Compliant with AC’97 v2.3 supporting 6 Channels of audio
outputs and V.90 HSP-Modem
• Integrated USB 2.0 Controller with three root hubs and eight
function ports
• Accommodates Intel P4/Celeron processors
• Supports a system bus (FSB) of 800MHz
• Supports “Hyper-Threading” technology CPU
“Hyper-Threading” technology enables the operating system into thinking it’s hooked
up to two processors, allowing two threads to be run in parallel, both on separate
“logical” processors within the same physical processor.
This motherboard uses an LGA775 type of Pentium 4 that carries the following fea-
tures:
Processor
• Supports DDR400/333/266 MHz DDR SDRAM memory module
• Accommodates two unbuffered DIMM of 2.5 volt DDR SDRAM
• Up to 1 GB per DIMM with maximum memory size up to 2 GB
Memory
Graphics
• Built-in a high performance 256-bit 3D engine, supporting Ultra-AGPII up
to 2.7GB/s bandwidth
• Built-in a high quality 3 D engine, supporting up to 2048x2048 teture size
• Supports VCD, DVD and HDTV decoding
™