[Holst]

I think the official position is this.

Epox provide unsupported overclocking options on there boards.

We do not provide any official overclocking support, or support for overclocking options..

So the board is only officially rated for stock voltages.
In the same way we dont officially support FSB over 166mhz.

The option is there for the extreme overclockers to use 2.2v, it works for some and not for others this is the nature of overclocking.