Today, in an industry-leading effort to affirm its commitment to environmental stewardship, AMD announced a new goal to deliver a 30x increase in energy efficiency for AMD EPYC processors and AMD Inst... AMD Sets a 30x Energy Efficiency Goal helped by AI Training and High Performance Computing Apps
They meant 30x but it's not as challenging when you're pretty far behind in most of those categories. It's not like they are saying Epyc CPUs itself will be 30x more efficient - it's a combination of efficiency improvements in hardware abd software with very specific worksets which can massively benefit from fixed acceleration (for example tensor operations).
Remember when M$ experimented with submarine type vessels for there servers for cooling and saving on energy. Damn good idea I thought.
They did achieve a superior than 25x improvement (31.7x according to them) in mobile CPUs through 2014-2020. (okay, they were coming from far probably at that time with their "architecture & nodes")
This 30X better efficiency, is probably just in certain taskloads. They'll probably add some specialized units and instructions to accelerate some types of calculations.
this sounds more extreme than the reality of their progress with TSMC and their improvements in uArch. if i'm putting dozens (or tens of dozens in future) of cores on an Epyc chip, and that chip itself goes to a sub 3n process, more cores at a higher (12 - 20 %) efficiency just by node alone. not to mention apps and A.I. and given that there are two Epyc node shrinkages in that time frame i say highly doable.