This is registered, ECC memory built for servers and workstations, not desktop boards — a plain module with none of the branding or lighting of Kingston's consumer lines, using on-board buffering to keep signal integrity up when a board is populated with many high-capacity modules.
Speed varies slightly across the family — a 2933 MT/s module at CL21 sits alongside another rated somewhat higher — and 64GB is supplied as 1×64GB in every listing here. On server boards the platform generally sets the operating speed rather than an XMP-style profile, so check your board and CPU's supported memory speed rather than assuming the module's rating is what it will run at.
All of it is DDR4 RDIMM, ECC, and requires a motherboard and CPU that explicitly support registered ECC memory — it will not work in a board built only for unbuffered consumer modules, and the reverse is equally true.