Double-wide, 16-lane PCI Express 2.0 graphics slot with one of the following graphics cards installed:.Multichannel audio through Mini DisplayPort.Analog stereo line-level input and output minijacks.Optical digital audio input and output TOSLINK ports.Front-panel headphone minijack and internal speaker.Five USB 2.0 ports (two on front panel, three on back panel).Four FireWire 800 ports (two on front panel, two on back panel).Hyper-Threading technology for up to 8 virtual cores.Turbo Boost dynamic performance up to 3.06GHz.