well maybe in the GX chipsets an exception can be made, because its based on the same structure and specs of the 890FX, but in things such as 880G and 785G etc they really dont clock well at all, i struggle to get 785G past 250fsb.
also on a unrelated point, same speed etc on everything, but on the 890GX chipset the cpu saps 1.42v but on the 890FX its only 1.36v? do they have different power designs?