Apple Desktop PC Mac Pro ME253LL/A Intel Xeon E5 3.7 GHz 12 GB DDR3 256GB Flash HDD Dual AMD FirePro D300 2GB Mac OS X 10.9 Mavericks Form Factor: Mini PC Graphics: Dual AMD FirePro D300 (3GB GDDR5 each) Type: Business Desktops & Workstations Usage: Business Colors: Black Processor: 3.7GHz Quad-Core Intel Xeon E5 Processor Main Features: 64 bit Quad-Core Processor Cache Per Processor: 10 MB L3 Cache