|To add to the above:|
Intel Core i7 Quad-core Processor
With four processing cores, the multitasking monster Quad-Core Intel Core i7 processor delivers fourfold the performance on highly-threaded applications, taking your desktop PC experience into a completely new realm of mega power. The powerful processor delivers serious performance on the ultra-demanding games of today and tomorrow. The innovative 45nm quad-core technology optimizes thermal performance for reduced power consumption and noise.
Integrated DDR3 Memory Controller
With the integrated DDR3 memory controller, the Intel Core i7 enables three channels of DDR3 1066 MHz memory, resulting in up to 25.6 GB/sec memory bandwidth. Plus the memory controller's lower latency and higher memory bandwidth delivers amazing performance for data-intensive applications.
In this case I believe the reason you would buy faster RAM than 1066 is to be able to tighten up the settings other than the frequency.
I am not up to speed on Intel boards as I don't run them so it is possible I am wrong here. Others can chime in.