Processor Intel?Pentium?III 450-733+** MHz @ 100/133MHz FSB Intel?Pentium?II 266-450 @ 66/100MHz FSB Intel?CeleronTM 266-400 MHz @ 66MHz FSB Chipset VIA Apollo Pro 133 Memory 4 DIMM up to 1GB SDRAM ECC memory support Onboard I/O Connectors 2 serial ports with UART 16550/IrDA interface 1 parallrel port with ECP/EPP 1 PS/2 mouse and keyboard connector 2 USB connectors and 1front USB pin header(mfg. option) Onboard PCI IDE 2 dual-channeled enhanced PCI Bus Master IDE connectors Ultra DMA 66 Expansion Slots 1 AGP (AGP1X/2X mode) 5 PCI 2 ISA BIOS ACPI 1.0a APM 1.2 / PnP 1.0a / SMBIOS 2.1 / DMI 2.0 / USB1.0 Protection & Management ACPI ready Hardware-based intelligent anti-virus protection S.M.A.R.T support Hardware monitoring (mfg. option) Intel LDCM client software (mfg. option) Form Factor ATX 7.98" x 12 " (202.7mm x 305mm)