Intel BOXDZ77GAL-70K LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard Intel Z77,Core i7 / i5 / i3 (LGA1155), DDR3 2400+ / 1600/1333/1066 Note: DDR3 1600 MHz DIMMs are only supported by 3rd generation Intel Core processor family processors Highly Optimized for Intel -K processors to get the best overclocking performance demanded by gamers and performance enthusiast. Highly optimized hardware and Intel Visual BIOS for advanced overclocking. Number of Memory Slots 4240pin, Memory Standard DDR3 2400+ / 1600/1333/1066 Note: DDR3 1600 MHz DIMMs are only supported by 3rd generation Intel Core processor family processors, Maximum Memory Supported 32GB Channel Supported Dual Channel Expansion Slots PCI Express 3.0 x16 2 (dual @ x8) PCI Express x4 1 x PCI Express x4 PCI Express x1 2 x PCI Express x1 PCI Slots 2 x PCI Slots Expansion Slots PCI Express 3.0 x16 2 (dual @ x8) PCI Express x4 1 x PCI Express x4 PCI Express x1 2 x PCI Express x1 PCI Slots 2 x PCI Slots Storage Devices SATA 3Gb/s 4 x SATA 3Gb/s SATA 6Gb/s 4 x SATA 6Gb/s 1 x PS/2, keyboard/mouse port HDMI 1 x HDMI USB 3.0 4 x USB 3.0 USB 1.1/2.0 4 x USB 2.0 IEEE 1394 1 x IEEE 1394a eSATA 1 x eSATA 6Gb/s S/PDIF Out 1 x Optical Audio Ports 5 Ports Internal I/O Connectors Onboard USB 4 x USB 3.0 + 6 x USB 2.0 Onboard 1394 1 x 1394a Physical Spec Form Factor ATX