Single 3.2 GHz Quad-Core Intel Xeon Processor * 6 GB of 1066 MHz DDR3 ECC SDRAM (three 2 GB DIMMs) * 1 TB Serial ATA Hard Drive (3Gb/s; 7200 rpm) * ATI Radeon HD 5770 Graphics with 1 GB of GDDR5 Memory * Mac OS X v10.8 Mountain Lion Operating System