ASUS PVI-486SP3 Mainboard Specifications: - Processor (On Board Intel Socket 3, White Socket) . IntelDX4 - 100MHz (P24C, DC 3.45V) . Intel i486 DX2/DX/SX, 487SX and 486 OverDrive Processor (P23T), . AMD Am486 DX/DX2/DX4 25-100MHz . UMC Green CPU-U5S 25-40MHz - Coprocessor . Internal Coprocessor of Intel DX4, 486DX, 486DX2, 487SX and 486 OverDrive (P23T) - Chipset . SiS 85C496 & 85C497 PCI Chipset . SMC 37C665GT ISA Multi-I/O Chip - Cache Memory . 128KB/256KB/512KB for option - System Memory . Two 72-pin SIMM Sockets Support 1MB to 128MB . Use 1/2/4/8/16/32/64MB 72-pin DRAM Module with 70ns Fast Page Mode - On Board Super I/O . 1 Floppy Port (2.88MB) . 2 Serial Ports (16550 Fast UART Compatible) . 1 Parallel Port (ECP, EPP Port) - On Board IDE . 2 x 32-bit Local Bus Enhanced-IDE ports (up to 4 IDE devices) . Support PIO Mode 3 - Expansion Slots . 2 32-bit PCI slots . 1 PCI/VL shared slot . 3 16-bit ISA slots - BIOS . Award 486 PCI BIOS and NCR PCI SCSI BIOS . Flash EPROM (for option) - Board Size . Half Size PCB, 22cm x 26cm (8.7" x 10.2") * The specification is subject to change without notice. * The brand and product names are trademarks of their respective companies.