There's some more nuance to efficiency than just max power at max load, of course. The Apple chips will likely have good efficiency compared to the lower core c

There's some more nuance to efficiency than just max power at max load, of course. The Apple chips will likely have good efficiency compared to the lower core count (say, 32) TR because the watts per core gets high on those smaller TR chips. Yet if you compared their performance at a fixed 90w, I suspect the threadripper would come out ahead, since chips are much more efficient when at fractional loads that don't lead to boosted core clocks. Then again, at idle, the TR is probably guzzling power relative to the M2 Ultra. I'm only speculating to illustrate; a thorough comparison of their perf/watt characteristics would involve sampling many types of workloads of varying thread counts and levels of per-core saturation.