ASRock MB-Z68X4G3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard USB 3.0: 2 x USB 3.0 SATA 6Gb/s: 4 x SATA 6Gb/s (SATA3_M2 connector is shared with eSATA3 port) North Bridge: Intel Z68 CPU Socket Type: LGA 1155 Number of Memory Slots: 4, 240pin CPU Socket Type: LGA 1155 North Bridge: Intel Z68 Number of Memory Slots: 4??240pin SATA 6Gb/s: 4 x SATA 6Gb/s (SATA3_M2 connector is shared with eSATA3 port) USB 3.0: 2 x USB 3.0 IEEE 1394: 1 x IEEE 1394a Form Factor: ATX Memory Standard: DDR3 2133(OC) / 1866(OC) / 1600 / 1333 / 1066