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> The Power9 18-core / 72-thread is going to come in at under 150W total.

The TDP on the 18 core (and 22 core as well) is 190W as listed on Raptor’s website.

That's an IBM TDP (i. e. maximum ever power), not an Intel TDP (i. e. maximum power at some arbitrary power state declared as 'base clock speed').