Biostar P4M900-M4 Socket 478 PCI-E m-ATX Socket 478 Supports Intel Pentium 4/Celeron D Processor Supports FSB 400/533/800MHz Support Intel Hyper-Threading Technology Chipset VIA P4M900 / VT8237A # CPU SUPPORT Intel® Pentium® 4 Processor # Intel® Celeron® D Processor # FSB Support FSB 533/800MHz # MEMORY Support DDR2 533/667 MHz # 2 x DDR2 DIMM Memory Slot # Max. Supports up to 4GB Memory # EXPANSION SLOT 2 x PCI Slots # 1 x PCI-E x1 Slot # 1 x PCI-E x16 Slot # STORAGE 2 x SATA Connectors # 2 x IDE Connector # Support SATA RAID: 0,1 # USB 4 x USB 2.0 Port # 2 x USB 2.0 Header # LAN Realtek RTL8201CL - 10/100 PHY # INTEGRATED VIDEO VIA Chrome9 HC IGP, On Board Graphic Max. Memory Share Up to 256MB # CODEC Realtek ALC861VD 6-Channel HD Audio # REAR I/O 1 x PS/2 Mouse # 1 x PS/2 Keyboard # 4 x USB 2.0 Port # 1 x COM Port # 1 x VGA Port # 1 x RJ-45 Port # 3 x Audio Connector # INTERNAL I/O 1 x Printer Header # 2 x USB 2.0 Header # 2 x SATA Connector # 2 x IDE Connector # 1 x Floppy Connector # 1 x Front Audio Header # 1 x Front Panel Header # 1 x CD-IN Header # 1 x S/PDIF-OUT Header # 1 x CPU FAN Header # 1 x System FAN Header # DIMENSION Micro ATX Form Factor Dimension: 19 cm X 24.4 cm ( W x L ) # OS SUPPORT Support Windows 2000 / XP / XP 64 # ACCESSORIES 1 x IDE Cable # 1 x FDD Cable(Optional) # 1 x SATA Cable(Optional) # 1 x I/O Shield # 1 x CD Driver # 1 x User Manual