Patriot Viper 3 Series - DDR3 UDIMM PC3-12800 (1600MHz) CL9 and CL10_D
v-Color DDR4 128GB (2 x 64GB) Hynix IC 2933MHz(PC3-23400) R-DIMM for Apple Mac Pro 2019 ECC Registered DIMM Dual Rank 2Rx4 1.2V CL21 (VHA21ASDRAG4T-CG29RD) at Amazon.com
v-Color DDR4 32GB (2 x 16GB) Hynix IC 2933MHz(PC3-23400) R-DIMM for Apple Mac Pro 2019 ECC Registered DIMM Dual Rank 2Rx8 1.2V CL21 Server Memory Ram Module Upgrade (VHA21ASDR8G8T-AG29RD) at Amazon.com