Surely that answer is kind of how I imagine it might work for clock scaling, but not for gating, which I thought was more about turning on/off clock completely to various blocks that are not being used?
In its current implemention, it does. Consider that this is Intel's first iteration of AVX-512 and don't forget that in its first iteration, also AVX was plagued by performance problems. These first iteration's main purpose is that "ordinary developers" (i.e. not only highly selected specialists that have to sign lots of Intel NDAs) can begin to develop and experiment with these new extensions. I believe that Intel has grand plans for AVX-512 and its next iteration will be the one that aims that "ordinary users" can profit performance-wise from applications that use AVX-512 instructions.
