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Green Micro ATX motherboard with four DDR slots, three PCI slots, and a Socket 478 CPU socket

ASUS

ASUS P4P800-MX Intel 865GV Socket-478 DDR 400 Motherboard

SKU CH-BASA-H44ZC MPN P4P800-MX

Socket-478 micro-ATX board with Intel 865GV chipset, four DDR-400 slots, PCI Express x16 and three PCI slots

  • Socket 478 supports Pentium 4 and Celeron CPUs
  • Intel 865GV chipset with 800/533 MHz FSB
  • Four 184-pin DDR 400 slots up to 4 GB dual-channel
  • PCI Express x16 plus three PCI expansion slots
  • Micro ATX 9.6 x 9.6 inch board with 6-channel audio and 10/100 LAN

Socket 478 Pentium 4 platform

The ASUS P4P800-MX is a Micro ATX motherboard built around the Intel 865GV chipset for Socket 478 Pentium 4 and Celeron processors. It targets system builders assembling replacement or legacy desktop PCs that require dual-channel DDR 400 memory support. The board provides a PCI Express x16 slot alongside three standard PCI slots for expansion cards.

Thermals noise and power

Passive chipset cooling keeps the Intel 865GV and ICH5 south bridge silent during typical office workloads. Power delivery is handled by the standard ATX connector without auxiliary CPU power, matching the thermal envelope of supported 800 and 533 MHz FSB processors. The bare-board design leaves cooler choice and airflow management to the chassis builder.

Micro ATX layout and connectivity

The square 9.6 by 9.6 inch form factor fits compact cases while exposing four 184-pin DDR slots for up to 4 GB of memory. Rear I/O includes six-channel audio from the ADI AD1888 codec, 10/100 Mbps LAN, dual PS/2 ports, one serial and one parallel port. Three analogue audio jacks provide basic speaker and microphone connections.

Highlights

  • Socket 478 supports Pentium 4 and Celeron CPUs
  • Intel 865GV chipset with 800/533 MHz FSB
  • Four 184-pin DDR 400 slots up to 4 GB dual-channel
  • PCI Express x16 plus three PCI expansion slots
  • Micro ATX 9.6 x 9.6 inch board with 6-channel audio and 10/100 LAN

Specifications

No published specifications for this item yet.

Questions about this item

How is the processor installed in the Socket 478 and what step is often missed?

Align the CPU notches with the socket keys, lower the lever fully to lock it, then attach the heatsink with thermal compound applied — skipping the compound causes overheating.

What maintenance or replacement will the onboard audio need later?

The ADI AD1888 6-channel codec is soldered to the board; if it fails the motherboard must be replaced or a PCI sound card added to the three PCI slots.

What limit appears first when the system runs at the 800 MHz FSB under sustained load?

The Intel 865GV chipset and ICH5 south bridge share a passive heatsink; prolonged high bus traffic raises chipset temperature until thermal throttling or instability occurs.

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