256c/512t off a single package… likely 1024 threads in a 2cpu system.
Basically we are about to reach the scale where a single rack of these is a whole datacenter from the nineties or something like that
Each core is multiples faster than a 90's CPU for various reasons as well. I think if you look at an entire rack it's easily a multiple of a 90's datacenter.
Perhaps the most comparable 1990s system would be the SGI Origin 2800 (https://en.wikipedia.org/wiki/SGI_Origin_2000) with 128 processors in a single shared-memory multiprocessing system. The full system took up nine racks. The successor SGI Origin 3800 was available with up to 512 processors in 2002.