It appears to be an issue with memory controller hub on the processor. Please bear in mind this is included on the processor.
If the processor is still under warranty please get in touch with our Warranty Department so they can help you to replace the unit: http://www.intel.com/p/en_US/support/contactsupport
I agree with you Allan,
I am able to run the memory at 1866mhz if I set it manually and set the CPU to "per core" instead of "sync all cores"
I've contacted Intel and they are RMA'ing a new chip.
Thanks for your input.