Apple Mac Pro MB535LL/A Desktop (OLD VERSION) Two 2.26GHz Quad-Core Intel Xeon "Nehalem" processor 6GB (six 1GB) 1066MHz DDR3 ECC SDRAM memory 640GB Serial ATA (3Gb/s); 7200 rpm 18x double-layer SuperDrive NVIDIA GeForce GT 120 with 512MB of GDDR3 memory, PCI Express 2.0, one Mini DisplayPort, and one dual-link DVI port