Key facts
- Brand
- VIA
- Model
- P4M800
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-04-09
Start here
VIA P4M800 mainboard for Intel Socket 775 processor Quick User's Guide
The VIA P4M800 is a Micro‑ATX motherboard for Intel LGA775 processors, supporting Pentium 4 and Celeron D CPUs up to 3.4 GHz, two DDR‑266/333/400 DIMM slots (up to 2 GB), and a range of I/O including USB 2.0, SATA, and 10/100 Mbps Ethernet. It features the VIA P4M800ce + 8237R Plus chipset with Unichrome Pro graphics and an onboard Realtek ALC‑655 audio codec.
The guide walks you through CPU and memory installation, optional VGA/PCI card mounting, and connecting peripherals. It also covers driver installation from the bundled CD and provides detailed instructions for safely flashing the BIOS if needed.
VIA P4M800 specifications
| Processor socket | LGA775 for Intel Celeron D 3xx, Pentium 4 5xx/6xx up to 3.4 GHz |
|---|---|
| Chipset | VIA P4M800ce + 8237R Plus AGP set |
| Memory slots | Two 184‑pin DDR SDRAM DIMM sockets |
| Maximum memory | 2 GB |
| PCI slots | Three PCI connectors (PCI v2.2) |
| AGP slot | One 1.5 V AGP‑8X (AGP v3.0) |
| IDE interfaces | Two IDE ports, UDMA‑33, ATA‑66/100/133 |
| USB ports | Eight USB 2.0 connectors |
| SATA ports | Two SATA ports, 150 MB/s, RAID 0/1/JBOD |
| LAN controller | 10/100 Mbps Fast Ethernet (VIA 6103L PHY) |
| Audio codec | Realtek ALC‑655, 2‑ or 6‑channel, AC’97 v2.3 |
| BIOS | Award Plug & Play BIOS with ACPI S3 support |
| Form factor | 245 mm × 230 mm Micro‑ATX |
| Supported OS | Windows 98SE, Windows 2000, Windows XP |
Source: VIA P4M800 mainboard for Intel Socket 775 processor Quick User's Guide
All VIA P4M800 documents by type
The shortest path to a working setup, usually only a few pages.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I install the CPU on the VIA P4M800 motherboard?
Open the load plate, align the processor with the socket cutouts, insert it straight down without tilting, and secure the heatsink with the clips before connecting the fan cable.
From: VIA P4M800 mainboard for Intel Socket 775 processor Quick User's Guide
How many DDR memory modules can be installed?
The board has two 184‑pin DDR SDRAM DIMM sockets and supports up to 2 GB of memory.
From: VIA P4M800 mainboard for Intel Socket 775 processor Quick User's Guide
How do I clear the CMOS on the P4M800 motherboard?
Set jumper JBAT1 to the clear‑CMOS position and keep it there while powering on.
What CPU bus speeds are supported?
The board supports FSB speeds of 533 MHz and 800 MHz.