The vast majority of power efficiency losses are in the copper interconnects within the chip, not the copper pins. Oh also, if you want fewer power pins, get r

The vast majority of power efficiency losses are in the copper interconnects within the chip, not the copper pins. Oh also, if you want fewer power pins, get ready for more heat and way more expensive CPUs. The pins are placed to be as cost effective and efficient as possible to power the individual chip modules (many of which will operate at different voltages). Also, it's way cheaper to convert power on the motherboard than within an already incredibly constrained CPU package. Edit: "vast majority" as far as power and other connections to the board go, the transistors create way more heat than the interconnects.