Late 2013 - MacPro6,1 (4-core)
Compatible ugprades for: ME253LL/A Late 2013 Mac Pro.
Standard RAM: 12 GB
Maximum RAM: 128 GB*
Details: 12 GB of RAM is installed as three 4 GB modules. By default, one slot is free.
*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