1 x PCI Express 2.0 x16 slot (at x16 mode) - 1 x PCI Express 2.0 x16 slot (at x4 mode, 2.5GT/s) - 2 x PCI Express 2.0 x1 slots (2.5GT/s) - 2 x PCI slots - Supports ATI™ CrossFireX™ and Quad CrossFireX™
extern:
1 x PS/2 Mouse Port - 1 x PS/2 Keyboard Port - 1 x Coaxial SPDIF Out Port - 1 x Optical SPDIF Out Port - 6 x Ready-to-Use USB 2.0 Ports - 2 x Powered eSATAII/USB Connectors - 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED) - 1 x IEEE 1394 Port - 1 x Clear CMOS Switch with LED - HD Audio Jack: Side Speaker / Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone