The Model MB5981 is an AT Form Factor with ATX connector that can be used in Antec's ATX Value Line Cases. This 100 MHz bus PCI/AGP board is based on the VIA AGPset chipset and includes 512B of onboard pipelined burst cache. In addition, as a Socket 7 based solution it offers plug-and-play performance.??The MB5981 includes 2 DIMM sockets to support 168 pin normal (i.e., 66MHz) or PC 100 SDRAM memory up to 256MB. It also features 3 ISA and 4 PCI expansion slots, 2 IDE Ultra 33 ports, a floppy port, a parallel port, 2 serial ports, an AT-style keyboard connector, 2 USB ports, and an optional PS/2 mouse port.