ASUS PCI/I-P55TP4XE Mainboard Specifications: - Processor . Intel Socket 5 or 7 ZIF Socket for CPU . Intel Pentium Processor 75/90/100/120/133/150/167 MHz (P54C/CS/CQS) - Coprocessor . Internal Coprocessor of Pentium Processor - Chipset . Intel 430FX PCIset - Architecture . 32-bit PCI Bus and 16-bit ISA Bus compatible - Cache Memory . 256KB/512KB Pipelined Burst SRAM Module . 256KB/512KB Asynchronous SRAM for option - System Memory . Four 72-pin SIMM Sockets Support 8MB to 128MB . Use 4/8/16/32MB 72-pin DRAM Module with 70ns Fast Page Mode or EDO DRAM (60 ns DRAM required when using 66MHz external clock) - On Board Super I/O . 1 Floppy Port (up to 2.88MB) . 2 Serial Ports (16550 Fast UART Compatible) . 1 Parallel Port (ECP, EPP Port) . IrDA TX/RX Header - On Board PCI IDE . 2 x PCI Bus Master IDE ports (up to 4 IDE devices) . Support PIO Mode 3, 4 and DMA Mode 2 - Expansion Slots . 3 32-bit PCI slots . 1 ASUS MediaBus slot (1 x PCI slot plus ASUS proprietary slot) . 3 16-bit ISA slots - BIOS . Award Pentium PCI BIOS with Green and Plug and Play Features . NCR PCI SCSI BIOS . 1M-bit Flash EPROM - Board Size . 27.2cm x 22.2cm (10.7" x 8.7") * The specification is subject to change without notice. * The brand and product names are trademarks of their respective companies.