https://www.theregister.co.uk/2019/04/02/supermicro_gen_2/

Server slinger Supermicro has dropped the veil on its range of second generation Xeon SP servers with Optane DIMM support – just as Chipzilla itself reveals all the gory details on its latest chippery.

The SP stands for Scalable Processors, Gen 2 Xeon SPs being the new term for what had been previously referred to by Intel as Cascade Lake, with up to 28-core SP variants and 24-core AP dual socket systems.