Threadripper 1000/2000 (and corresponding Epyc) were true NUMA: each chiplet had IO for PCIe and memory onboard, and each die handled part of it. Thus you have

Threadripper 1000/2000 (and corresponding Epyc) were true NUMA: each chiplet had IO for PCIe and memory onboard, and each die handled part of it. Thus you have "near" and "far" memory like a traditional NUMA. On Zen2 everything goes through the IO die. In a sense this means everything is "far" now, but it is uniform, and performance seems to be very good despite this (perhaps due to the insane amount of cache meaning less need to hit memory as frequently).