nevermind found it:
It requires the whooping core voltage of 1.75 V by default. Normal Coppermines' only require 1.65 V. This increases the power hunger of that CPU over the Giga-Pentium III (1.7 V) significantly by already at least 3%, plus the 13% required by the higher clock speed, summing up to over 16 % more power hunger. Please forget the fairy tale from the fishy publication that claims 35 W of instead of 33 W of the Giga-Pentium III. It doesn't require more than simple math to see that this claim is just as wrong as the rest published there