Early 2007 - MacPro2,1
Compatible upgrades for Early 2007 Mac Pro's.
Standard RAM: 1 GB
Maximum RAM: 32 GB*
Details: 1.0 GB of RAM installed as two 512 MB modules. 6 slots free. RAM must be installed in pairs, and for "best acoustic performance" contain an "Apple-approved heat sink".
*Apple officially supports a maximum of 16 GB of RAM but third-parties have been able to upgrade the system to 32 GB of RAM using eight 4 GB memory modules.
RAM Slots: 8