I have some I'm looking to sell
8x32GB modules of DDR4-2666, PC4-21300R 3DS (TSV) Registered, ECC (RDIMM), 1.2V, 288-pin
It was working perfectly in my Supermicro motherboard, but I've changed my systems around so it's up for sale so that I can get some different hardware.
You would need to check if TSV ram will work in your motherboard first.