LGA 2011, also called Socket R, is a CPU socket by Intel. It replaces Intel's LGA 1366 (Socket B) in the performance and high-end desktop and server platforms.
Socket R uses QPI to connect the CPU to additional CPUs. DMI 2.0 is used to connect the processor to the PCH. The memory controller and 40 PCIe lanes are integrated on the CPU. On a secondary processor an extra x4 PCIe interface replaces the DMI interface.
The socket supports Sandy Bridge E-series processors with 4 memory channels of DDR3, as well as, 40× PCIe 2.0 or 3.0 lanes;The Extreme Edition processor supports six cores with 15 MB of shared L3 cache on a ring bus and a quad-channel DDR3 memory controller. LGA 2011 will also be compatible with future Ivy Bridge-E processors. more info
CPU Comparison Chart
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