Is there any way to bump up I/O voltage on Abit BH6 ver 1.0?

[WharpedFactor]

Can't find anywhere to change it in Softmenu so is there any other way? Running CellyII 600 at 1008 with 1.9v & Alpha PEP66 3DMark 2000 boots me back to the desktop. It will complete the tests if I boost the Vcore to 1.95 but if I can bump the I/O voltage and accomplish the same thing I'd much rather do that.