Threadripper is a consumer grade part with no certified support for ECC memory Save the UDIMM variety! AMD's New Threadripper Pro Branded parts are Actually what Servethehome calls WEPIC(Workstation Epyc). And the Epyc Branding has supplanted AMD's Opteron line of Branding in AMD's Server/HPC market products since the arrival of AMD's Zen CPU micro-architecture.
Threadripper Pro is really Workstation Epyc as that comes with the full 8 memory channels per socket and 128 PCIe 4.0 lanes support as well as fully certified by the Motherboard suppliers ECC memory support for all ECC memory types and that includes ECC RDIMM support and 2TB memory capacity as well compared to the non Pro Threadripper consumer variants that only support 256GB or ECC UDIMM memory on motherboards that are not necessarily certified for ECC Memory support even if the consumer Threadripper has ECC memory support enabled.