In this video you will see how Xilinx achieved this and how you can flexibly control performance-per-watt on the same device, within the same socket.
Realising 2-5X system level performance-per-watt vs. 28nm solutions
Xilinx’s UltraScale+ portfolio of FPGAs and MPSoCs deliver value far beyond a traditional process node migration by providing two to five times greater system-level performance/watt over 28nm 7 series devices.