It is highly probable that the new line up from the Intel stable will not allow OC. Seems like a deliberate architecture design, and only 2-3% OC will be possible via the BCLK. All the BUS lines will be mated to a single internal clock, thus removing the external clock generator. Which literally translates to: if the memory/base clocks are tweaked then SATA, PCI, PCI-E and like wise also toggle.
Again this is speculation. Here is the article.
Again this is speculation. Here is the article.