Intel recently announced its new fifth generation ‘Broadwell’ processor chips for personal computers, laptops and server. Using 14nm geometry the new line of CPUs offers a lower power footprint, better throughput for multimedia, while keeping computing performance flat.
The following graphic outlines that the raw number of transisitors has grown 35% to 1.4 billion for an i7 CPU. The TDP (total dissipated power) for theses designs is only 15W. It can throttle back to 7.5W for even lower battery burn.
For server applications, the CPUs are even larger to almost 2 billion transistors. Total power tops out at 28 watts.