Apple Mac Pro MB871LL/A Desktop (OLD VERSION) Next-generation system architecture and 2.66 GHz Quad-Core Intel Xeon 3500 "Nehalem" processor 3 GB RAM (expandable up to 16 GB), 640 GB hard drive (expandable to 4 TB), 18x Double-Layer SuperDrive NVIDIA GeForce GT 120 with 512MB of GDDR3 memory with one Mini DisplayPort, and one dual-link DVI port Five USB 2.0, four FireWire 800, Gigabit Ethernet, optical digital audio input and output, Bluetooth 2.1+EDR Pre-loaded with Mac OS X 10.6 Snow Leopard and iLife '09; includes Apple Keyboard with Numeric Keypad and Mighty Mouse