Yes, you need more juice. How did you get the board above 114MHz fsb?
I tried to briefly and even with the jumper could not get beyond that.
I will also say that you may be optimistic about those chips going that far. I've been working with 700E, 750 and 800s and very few of them do 1Ghz, with the 700E being most likely to succeed, due to it's lower multiplier.