Model Years: Mid 2006, Early 2008, Early 2009

Storage: 80GB to 2TB (HDD)

Initial OS: X Server 10.4.8 (Mid 2006)

Latest OS:
- OS X 10.7.5 Lion (Mid 2006, Early 2008)
- OS X 10.11.6 El Capitan (Early 2009)

Released: August 7 2006

Discontinued: January 31 2011

Processor:
- Intel Xeon 5130 (Mid 2006)
- Intel Xeon 5150 (Mid 2006)
- Intel Xeon 5160 (Mid 2006)
- Intel Xeon E5462 (Early 2008)
- Intel Xeon E5472 (Early 2008)
- Intel Xeon E5520 (Early 2009)
- Intel Xeon X5550 (Early 2009)
- Intel Xeon X5570 (Early 2009)

Graphics:
- ATI Radeon X1600  (Mid 2006, Early 2008)
- Nvidia GeForce GT 120 (Early 2009)

RAM Configurations Sold:
- 1GB ECC DDR2 RAM 667MHz (Mid 2006)
- 2GB ECC DDR2 RAM 800MHz (Early 2008)
- 3GB ECC DDR3 RAM 1066MHz (Early 2009)

New Features:
- Faster performance
- Increased support
- Intel Xeon
- Higher storage