Use this guide to install a PCI Express card like a graphics card or the Lycom DT-120 in your 2010/2012 model Mac Pro.
Mac Pro 2010/2012 PCI Express Card Install Guide (MacPro5,1)
Use this guide to install a PCI Express card like a graphics card or the Lycom DT-120 in your 2010/2012 model Mac Pro.