Late 2013 - MacPro6,1 (8-core)
Compatible upgrades for Late 2013 Eight Core Mac Pro.
Standard RAM: 12 GB, 16 GB
Maximum RAM: 128 GB*
Details: 12 GB of RAM is installed as three 4 GB modules and 16 GB of RAM is installed as four 4 GB modules. One or no slots are free, accordingly.
*Apple formally supports 64 GB of RAM in this model, but third-parties have determined it can support 128 GB of RAM.
RAM Slots: 4