> is the processor quoted really a four core?

Yes, it is a four-core with SMT4 (= 16 threads) on a Sforza module:

"Currently on its way to my doorstep is a two-CPU, octocore (each core is SMT-4, so that's 32 threads) Sforza POWER9 Talos II "
http://tenfourfox.blogspot.com/2017/08/and-now-for-several-things-that-are.html

Another interesting comment from the same source:

"if you were actually in the market for an AmigaOne X5000, this blows it out of the water. You could just run UAE on this and have cycles to spare!"

I guess this means that OS4 runs allegedly faster in (FS-)UAE on Talos II (is there even PPC emulation in UAE for anything other than x86(-64)?) than natively on the X5000.


Edit: Now also on the Raptor website:
https://www.raptorcs.com/content/CP9M01/intro.html

[ Edited by Andreas_Wolf 10.08.2017 - 07:05 ]