Specifications MFG-PART#: SHUTTLE SS51G BAREBONE SS51G CPU: P4(SOCKET 478), FSB400/533; CPU UP TO P4 2.53G CHIPSET: SIS651/962L MEMORY: 2 DDR(200/266/333) UP TO 2GB SLOTS: 1AGP(2X/4X), 1PCI, 3 IEEE1394, 4USB 2.0 PORTS AUDIO: REALTEK ALC 650 VIDEO: INTEGRATED SIS651 UP TO 64MB LAN: ONBOARD REALTEK RT8139 LAN 1X 5.25" RESERVED BAY; 2X 3.5" RESERVED BAY (D)280MM*(W)200MM*(H)181MM PARALLEL PORT(OPTIONAL)