http://www.intel.com/support/processors/sb/cs-001614.htm
Can Intel® processors be overclocked? 

Intel® processors are validated and supported only when they are operated at their factory rated settings. Operating a processor faster than it was designed (overclocking) can cause permanent damage to the processor, and possibly other system components including the motherboard. Other negative results are possible including the inability to boot or calculation errors. Operating a processor outside of specification will likely shorten the life of the processor, and can also void any available processor warranty.