2
Introducing the Motherboard
Feature
Processor
PM800-M2 uses a 478-pin socket type of Pentium 4 that carries the following features:
• Accommodates Intel Pentium 4 478-pin CPU
• Supports a system bus (FSB) of 800/533/400 MHz
• Intel P4 Celeron: FSB 400, 128K L2 cache
• Intel Pentium 4 Willimette: FSB 400, 256K L2 cache
• Intel Pentium 4 Northwood: FSB 533/400, 512K L2 cache
• Intel Pentium 4 Northwood: FSB 800/533, 512K L2 cache, HT supported
• Intel Pentium 4 Prescott: FSB 800/533, 1024K/256K L2 cache
“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.
The VIA PM800 Northbridge (NB) and VT8237 Southbridge (SB) chipset is based on an
innovative and scalable architecture with proven reliability and performance.
• Supports 400/333/266/200 MHz DDR SDRAM memory module
• Accommodates two unbuffered 2.5V 184-pin slots
• A total maximum capacity 2 GB
Chipset
Memory
VT8237 (SB)
• Supports 16bit 66 MHz V-Link Client interface with peak
bandwidth of 1 GB/sec
• Compliant with PCI 2.2 specification at 33 MHz
• Integrated Serial ATA Host Controllers, supporting data trans-
fer rates up to 1.5Gb/s
• Network Controller, supporting enterprise class 10/100 Mb
Fast Ethernet MAC
Graphics
• 128-bit 2D/3D engine
• Supports 64/32/16 MB Frame Buffers size
• Supports 8bpp, 15/16bpp and 32bpp color depth modes
• Supports pixel rate up to 200-million pixels per second for 2 textures each
The AC’97 Audio CODEC is compliant with the AC’97 2.3 specification that provides
18-bit stereo full-duplex CODEC with independent and variable sampling rate. It sup-
ports S/PDIF compressed digital or LPCM audio out. Features include support for 3.3V
digital, 5V analog power supply and low power consumption management.
AC’97 Audio CODEC
PM800 (NB)
• Integrated Pentium 4 Northbridge with 800 MHz FSB sup-
port and UniChromePro 2D/3D Graphics Controller in a single
chip
• Advanced 64-bit SDRAM controller supporting DDR400/333/
266/200 SDRAM
• Supports 66 MHz V-Link Host interface with total band-
width of 1 GB/sec
• Supports AGP 3.0 with 8X/4X transfer mode
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