Late 2013 Mac Pro 3.5GHz 6-core/16GB RAM/256GB PCIe based Flash/Dual D500 w/ 3GB VRAM each/OS X Form Factor: Mini Tower Graphics: Dual AMD FirePro D500 w/ 3GB VRAM each Type: Business Desktops & Workstations Part Number: MD878LL/A Usage: Others Colors: Black/Silver Processor: 3.5 GHz Six Core 22-nm Xeon E5-1650v2 Processor Main Features: Hyper-Threading Technology