Well, assuming that your board's QIP Voltage is equivelant to my P6T's I'd say you'd be putting your system in danger by going that high. Mine is at 1.3375v right now on a 3.8ghz OC. I can't imagine needing more than the reccomended max 1.35v (some people argue that 1.45v is the max, but I'm not gonna try it... no way).