The P6BXT-A+ is a full-sized ATX board measuring 305x220mm and using 4-layer printed circuit board. The P6BXT-A+ has a special design feature so that it includes a Slot-1 processor slot and a PPGA (Plastic Pin Grid Array) Celeron Socket-PGA370 processor socket. This feature means that you can install the mainboard with either a Pentium-III cartridge, a Pentium-II cartridge, the SEPP (Single Edge Processor Package) Celeron cartridge, or one of the new generation PPGA Celeron cartridges. In addition, the mainboard supports a 66 MHz memory bus, or a 100 MHz memory bus, so you can use inexpensive 66MHz memory chips, or higher-performance PC-100 memory chips. The board is installed with an integrated PCI-3D sound system and has a full suite of I/O ports. Seven expansion slots are available for system development and hardware monitoring is supported. This board allows complete flexibility. System integrators can choose the high-performance Slot -1 processor or the inexpensive PPGA Celeron processor according to the system requirements and the price/performance comparison of the two kinds of processor. 
PROCESSORS
 SECC2 Pentium III up to 850MHz(100MHz FSB), Pentium II
 FC-PGA Pentium III up to 850MHz(100MHz FSB)
 Celeron PPGA up to 533MHz / FC-PGA up to 800MHz 
CHIPSET
 Intel 440BX 
MEMORY
 Three 168-pin DIMM
 Maximum: 768MB 
SYSTEM BIOS
 Award BIOS 
I/O INTERFACE
 Supports Plug and Play function
 One - EPP/ECP mode parallel port
 Two - 16550 high-speed serial I/O ports (2 connectors)
 Supports 360K~2.88M Byte, 3 Mode FDDs or LS120
 Dual PCI IDE interfaces - supports four IDE devices
    (PIO mode 4, DMA Mode 2, Ultra DMA 33)
 PS/2 keyboard and PS/2 mouse connectors
 ATX Power Supply Connector
 Audio Ports(Line-in, Line-out, Mic-in, CD-in and game port)
 Two sets of USB connector 
 Other ports:
    IrDA Cable header
    Green, HDD, power indicator LED headers
    CPU and Case Fan headers
    LAN Card Wake Up/Internal Modem Ring Wake-Up headers  
RTC & BATTERY
 Intel 82371EB (PIIX4E) included 256 bytes CMOS SRAM 
FORM FACTOR & LAYERS
ATX (305mm*220mm)
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hiergreets
Pedro