"There certainly appears to be a built-in overclock lock with the new 925X and 915 Intel chipsets. The design limit appears to be around 10% over the rated speed of the CPU. Asus has found a way around this artificial limit, but it appears that they have not been able to completely bypass the Overclock Lock, since overclocks on the Asus still seem limited to about 24%."
Ryktet verkar således vara en sanning med modifikation - då det bevisligen är upp till moderkortstillverkaren hurvida de vill implementera begränsningen eller ej.
Hela artikeln finner ni hos AnandTech.