[neuromancer2701]

The "Rome" EPYC processors have 64 cores and 128 threads and with a dual processor board you can have 128 cores 256 threads in a 1U server.

[mattashii]

SuperMicro has systems with 2 dual-socket systems in a 1u form factor[0], so 256c/512t per rack unit is not that far fetched.

[0] For intel scalable: https://www.supermicro.com/products/system/1U/1029/SYS-1029T...

[shiftpgdn]

That's just 2 servers with a shared backplane.