Intel Extreme Series DDR3 2400 LGA 2011 Desktop Motherboard (BOXDX79SI) Supports both 4 core and 6 core processors. Features Intel Turbo Boost Technology, Intel Hyper Threading Technology for exceptional performance and scalability, and 15MB Shared Intel Smart Cache, enabling dynamic and efficient allocation of cache. Features DMI uni-directional connectivity to the processor Designed to support over clocked DDR3 2400 O.C. memory, delivering up to 64 GB/s memory bandwidth Two IEEE 1394a ports (1 external, 1 via internal header), and 14 USB 2.0 ports (6 back ports, 8 via internal headers) which provides for the most flexible back panel connectivity options Three PCI Express 3.0 x16 slots improving graphics bandwidth and support for certified triple-card ATI Crossfire X and NVIDIA SLI. PCI Express and PCI connectors provide flexibility to support PCI Express and legacy PCI devices. Two SATA 6.0 GB/s ports and four SATA 3.0 GB/s ports: Support for up to six ports with the ability to disable individual ports via the Intel Rapid Storage driver stack. Intel Rapid Storage Technology: Performance and reliability with support or RAID 0, 1, 5, 10, and Intel Rapid Recover Technology