If I stack a fortune 3 (x80 consumption) and a speed 3 (same), would the result be additive or multiplicative? Will I need x160 power, or a staggering x6400?
Not quite sure, but I am 99% sure you won't have enough power
It seems to be multiplicative, but I am a silk touch user.
Look at DMAC vids, he shows how much power you need to run at full speed, but can't remember by heart