Mid-2012 - MacPro5,1 (6-core)
Compatible upgrades for Mid 2012 Mac Pro.
Standard RAM: 6 GB (8GB - Server)
Maximum RAM: 48 GB*
Details: 6 GB of RAM is installed as three 2 GB modules. One slot is free.
**Apple officially supports 32 GB of RAM. However, this model actually can support 48 GB of RAM.
RAM Slots: 4*