One 2.66GHz Quad-Core Intel Xeon "Nehalem" processor
3GB (three 1GB) memory
640GB hard drive 1
18x double-layer SuperDrive
NVIDIA GeForce GT 120 with 512MB

Two 2.26GHz Quad-Core Intel Xeon "Nehalem" processor
6GB (six 1GB) memory
640GB hard drive 1
18x double-layer SuperDrive
NVIDIA GeForce GT 120 with 512MB