Chipset Intel 865PE / ICH5 MEMORY Support Dual Channel DDR 200/266/333/400 MHz 4 x DDR DIMM Memory Slot Max. Supports up to 4GB Memory EXPANSION SLOT 1 x AGP 8X Slots 5 x PCI Slots LAN Realtek RTL8100C - 10/100 Controller CODEC Realtek ALC655 6-Channel AC97 Audio REAR I/O 1 x PS/2 Mouse 1 x PS/2 Keyboard 4 x USB 2.0 Port 2 x COM Port 1 x Printer Port 1 x RJ-45 Port 3 x Audio Connector INTERNAL I/O 2 x USB 2.0 Header 2 x SATA Connector 4 x IDE Connector 1 x IrDA Header 1 x Front Audio Header 1 x CD-IN Header 1 x S/PDIF-OUT Header 1 x Chassis Open Header DIMENSION ATX Form Factor Dimension: 22.5cm x 29.5cm ( W x L ) Please do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games. Note: Try to set a system restore point before installing a device driver. It will help you restore system if installed driver not complete.