Listing price is for a single ASUS P4S800-MX V2.0 I purchased years ago for building restaurant POS systems.  The ones installed were frequently upgraded or replaced with all in one units by restaurant owners when payment systems upgraded... I will have a separate listing for those units. 

These motherboards l kept were taken from test, demo & backup units.   Low hours, all original capacitors looks good and tested normal with ESR meter.   All motherboards will be tested again before shipping. Send it back if DOA, otherwise the through hole capacitors on it are pretty easily exchanged. I have done 20+ boards and is getting better.

This board is compatible with full range of P4 CPU & DDR in double channel mode, easy bios update via floppy disk.

Compatible with win98, windows 2000, XP, several popular  Linux 32 distro. Solid and very reliable...when installed with low powered CPU for example 1.6a Northwood, scheduled cleaning,  occasional capacitor exchange, some units has operated 18+ years none stop in a friend's restaurant...under mine care.

I am not a legacy gamer, but do know this board & its AGP port has good reputation for hardware, OS & overclock support. My specialty is running them cool, low powered for as long as possible.

This board has legacy parallel, serial, floppy, IDE ports, perfect for old POS, legacy embroidery machine, printer server...

Some of my experience: when replacing dead V1.0 w this V2.0 board, system will not boot correctly in win2k/XP due to unrecognized device.  Swapping the socketed BIOS chip with the old version will make the system think nothing is changed and allow booting into windows and functions like the old board.  Make sure the new BIOS chip is installed to take advantage of new futures. If you need V1.0, let me know. I may have some in storage.

I will include a tested CPU when Buy-it-now at listed price.

If you need a fully assembled and tested unit, let me know. I have several size cases and drives available.

Following is AI generated:

This Asus P4S800-MX SE Socket478 ATX motherboard is a reliable choice for both casual computing and retro gaming. It is compatible with Intel 478 P4 CPUs and DDR1 SDRAM memory, and has 2 memory slots for a maximum of 2GB RAM. It also features on-board audio and video chipset, making it a great option for multimedia use.

The motherboard has a number of expansion slots including PCI and AGP, as well as a variety of input/output ports such as VGA, PS/2, USB 1.0/1.1, PATA/IDE/EIDE, Ethernet (RJ-45), and USB 2.0. It was manufactured in China and is suitable for use in a wide range of computer systems.