In the mobo spec the LGA 1155 and LGA 2011 refers to the cpu socket. The LGA 1155 has 1155 pins in the socket and the cpu has1155 holes to accept them. The LGA2011 has 2011 pins and is much largerand the cpu is also larger and has 2011 holes. The LGA 2011 AND 1155 are not interchangeable. The next intel cpus Haswell will use a new socket with 1150 pins. That's Intel.