
MB800V
Socket 478 Intel 845G ATX Motherboard — AGP, PCI, ISA and MicroPCI expansion
MB800V (MB800) Socket 478 Intel Pentium 4 ATX motherboard with Intel 845G chipset, AGP/PCI/ISA/MicroPCI expansion and dual RS-232/422/485 serial ports. Local warranty support and engineering customization available on request.
Specifications
| CPU Socket | Socket 478 |
|---|---|
| CPU | Intel Pentium 4, 1.30GHz ~ 3.06GHz+ (MB800H v1.2 supports Prescott CPU) |
| Chipset | Intel 845G chipset |
| Processor Side Bus Frequency | 533MHz (133MHz x4) / 400MHz (100MHz x4) |
| L2 Cache | 256K/512K, CPU integrated |
| BIOS | Award BIOS, ACPI supported |
| System Memory | Two DDR slots, up to 2GB PC200/266 DDR SDRAM |
| VGA | Intel 845G chipset integrated |
| Primary LAN | ICH4 integrated Ethernet, 10Base-T / 100Base-TX |
| Audio | ICH4 integrated audio with AC97 Codec |
| LPC I/O | Winbond 83627HF — IrDA x1, Parallel x1, COM1 (RS-232), COM2 (RS-232/422/485), FDC up to 2.88MB (3-mode), hardware monitoring |
| IDE Interface | Built-in ICH4; two enhanced IDE channels, 4 devices, UDMA33/66/100, PIO mode 4, bus master |
| FDD Interface | Up to two floppy drives: 3.5" and/or 5.25", 3-mode support |
| Parallel Port | One port, SPP/EPP/ECP |
| Serial Ports | 1x RS-232/422/485 + 3x RS-232 (COM3/COM4 via Winbond 83877) |
| Watchdog Timer | System reset, 256 levels |
| Solid State Disk Interface | 2MB ~ 288MB M-Systems DiskOnChip flash disk |
| Hardware Monitoring | Winbond W83627HF — system/CPU temperature and voltage status |
| USB | USB 1.1 / 2.0, 4 ports |
| IrDA | Pin header |
| Keyboard / Mouse | PS/2 connectors |
| Digital I/O | 4 in / 4 out |
| Expansion Slots | 1x AGP, 3x PCI, 3x ISA, 1x MicroPCI |
| PCI to ISA Bridge | Winbond 83628, Winbond 83629 |
| Power Connector | ATX 12V power connector |
| Form Factor | ATX motherboard |
| Dimensions | 305mm x 244mm (12" x 9.6") |
| Power Consumption | P4 1.8GHz w/ 512MB DDR: +5V 5.7A, +12V 8.5A · P4 2.2GHz w/ 512MB DDR: +5V 6.35A, +12V 6.2A |
| Operating Temperature | 0°C~60°C (32°F~140°F) |
| Storage Temperature | -20°C~80°C (-68°F~176°F) |
| Relative Humidity | 10%~90% (non-condensing) |
I/O — Rear panel
Front access
Where the MB800V is deployed
Drop-in board for custom enclosures, instrumentation, and purpose-built hardware.
PLC-adjacent controllers, motion control, and machine-tending applications.
Drop-in replacement motherboard for fielded industrial PC chassis.
ISA/PCI/AGP slot-based systems for legacy expansion cards.
Our applications engineers will match your environment, software stack and I/O requirements to the right platform — or modify this one.
TALK TO AN ENGINEERResources
- DOWNLOAD ↓MB800V user manualPDF document
- DOWNLOAD ↓MB800V diagramPDF document
Licensed customers get access to BIOS source, schematics, and full production test documentation.
REQUEST PORTAL ACCESS

