SPECpower_ssj2008  —  SPECpower_ssj2008 is the first industry-standard SPEC benchmark that evaluates the power and performance characteristics of volume server class computers.  With SPECpower_ssj2008, SPEC is defining server power measurement standards in the same way we have done for performance.

Source:   SPEC - Standard Performance Evaluation Corporation

Link:   http://www.spec.org/power_ssj2008/