Total Capacity: 64GB. INSIDE YOUR MAC PRO 2013. Your Mac Pro has 4 slots and the maximum possible upgrade is 128GB (4x32GB). Module Capacity: 16GB.
Corsair Vengeance LPX 64GB (4x16GB) DDR4 3200MHz CL16 RAM Memory Kit Black
Corsair Vengeance 64GB (4x16GB) 3600MHZ DDR4 RGB RAM
32 GB RAM (2 x 32GB) DDR4 2666MHz SODIMM Laptop Memory RAM - 64GB Kit
64GB 32GB 16GB 8GB DDR3 1600MHz DIMM Memory RAM Crucial Ballistix Sport LOT UK
Lexar UDIMM DDR4 RAM 8GB 3200 MHz, 288-Pin Desktop Memory, RAM Module Upgrade
Kingston 16GB 2X8GB DDR3 2RX8 1600MHz PC3-12800S 204pin Laptop Memory RAM 1.5v
