"By now most of you should be familiar with the Core i7
processor family, which is based upon Intel's Nehalem architecture.
The Core i7 series was introduced with a new CPU socket, LGA-1366,
which replaces the LGA-775 socket and is not backwards compatible.
Like what has been done with AMD processors for years, with the CPU
socket and new Core i7 series comes moving the memory controller
onto the CPU die. The integrated memory controller supports three
DDR3 memory channels. The initial Core i7 processors are built with
a 45nm process and have approximately 731 million transistors."