There's a couple of things going there. One of them is that nowadays you have enormous caches (6 MB?) to fill out the chip and wring out performance. Unfortunat

There's a couple of things going there. One of them is that nowadays you have enormous caches (6 MB?) to fill out the chip and wring out performance. Unfortunately, in today's deep submicron processes, you get significant static current which was not a problem ten years ago. (If you put the cache in an ARM, it will have the same power draw.) The other is that the server chips (not to mention laptop) are where to look for the best in power efficiency. For consumer/gamer machines with 200W graphic cards ...