I just saw this over at Benchtec, posted by Sacha35:
“Heads up for all the extreme overclockers using the ASUS Maximus III Formula with the Clarksdale CPUs. There seems to be some incompatibility in the TurboV software when overclocking, when pushing BCLK the system will lock and change registers for VTT, PLL, and Dram. I’m not sure if this problem is apparent for normal usage/air or water overclocking, but for extreme use please note that you could run into problems with your CPUs when using the turboV software to raise the BCLK.
See picture below that clearly shows the registers changed from a setting of 1.35VTT and 1.7VPLL to 1.1VTT and 2.5PLL, when pushing BCLK, which will without any doubt will have a detrimental effect on your CPU.”
Apparently, Asus is working on a fix to solve the issue, but untill a solution has been found, please be careful when using the combination of Turbo-V and Clarkdale!