I like how Intel states in 2011:
What is AMD’s ACP?
According to AMD documentation, ACP (Average CPU Power) is the average (Geometric Mean) power a processor was measured to dissipate while running a collection of 5 different benchmarks (Transaction Processing Performance Council (TPC Benchmark*-C), SPECcpu*2006, SPECjbb*2005,and STREAM.)
Why doesn’t Intel provide an ACP value for their processors?
Intel sees no value adding another specification to our processors. As noted above, ACP is not useful for system or processor thermal engineers and end users can get more accurate power consumption values by simply measuring the actual power of their server while running their specific application. In addition, AMD does not specify exactly where in their silicon process distribution they measure ACP, so it would be impossible for Intel to create an identical ACP specification.
And then in 2013 introduces SDP, which is:
Scenario design power
Intel's description of Scenario Design Power (SDP): "SDP is an additional thermal reference point meant to represent thermally relevant device usage in real-world environmental scenarios. It balances performance and power requirements across system workloads to represent real-world power usage."