Model Years: Mid 2006, Early 2007, Early 2008, Early 2009, Mid 2010, Mid 2012

Storage: 250GB to 1TB (HDD)
512GB (SSD)

Initial OS: MacOS X 10.4.7 Tiger (Mid 2006)

Latest OS:
- OS X 10.7.5 Lion (Mid 2006, Early 2007)
- OS X 10.11.6 El Capitan (Early 2008, Early 2009)
- macOS 10.14.6 Mojave (Mid 2010, Mid 2012)

Released: August 7 2006

Discontinued: October 22 2013

Processor:
- Intel Xeon 5130 (Mid 2006)
- Intel Xeon 5150 (Mid 2006)
- Intel Xeon 5160 (Mid 2006)
- Intel Xeon X5365 (Early 2007)
- Intel Xeon E5462 (Early 2008)
- Intel Xeon E5472 (Early 2008)
- Intel Xeon X5482 (Early 2008)
- Intel Xeon W3520 (Early 2009)
- Intel Xeon W3540 (Early 2009)
- Intel Xeon W3580 (Early 2009)
- Intel Xeon E5520 (Early 2009)
- Intel Xeon X5550 (Early 2009)
- Intel Xeon X5570 (Early 2009)
- Intel Xeon W3530 (Mid 2010)
- Intel Xeon W3565 (Mid 2010, Mid 2012)
- Intel Xeon W3680 (Mid 2010, Mid 2012)
- Intel Xeon E5620 (Mid 2010)
- Intel Xeon X5650 (Mid 2010, Mid 2012)
- Intel Xeon X5670 (Mid 2010)
- Intel Xeon E5645 (Mid 2012)
- Intel Xeon X5675 (Mid 2012)

Graphics:
- Nvidia GeForce 7300 GT (Mid 2006, Early 2007)
- ATI Radeon X1900 XT (Mid 2006, Early 2007)
- Nvidia Quadro FX 4500 (Mid 2006, Early 2007)
- ATI Radeon HD 2600 XT (Early 2008)
- Nvidia GeForce 8800 GT (Early 2008)
- Nvidia Quadro FX 5600 (Early 2008)
- Nvidia GeForce GT 120 (Early 2009)
- ATI Radeon HD 4870 (Early 2009)
- ATI Radeon HD 5770 (Mid 2010, Mid 2012)
- ATI Radeon HD 5870 (Mid 2010, Mid 2012)

RAM Configurations Sold:
- 1GB PC5300 DDR2 ECC RAM 667MHz (Mid 2006, Early 2007)
- 2GB PC6400 DDR2 ECC RAM 800MHz (Early 2008)
- 3GB PC3-8500 DDR3 ECC RAM 1066MHz (Early 2009, Mid 2010)
- 3GB PC3-10600 DDR3 ECC RAM 1333MHz (Mid 2010)
- 6GB PC3-8500 DDR3 ECC RAM 1066MHz (Early 2009, Mid 2010, Mid 2012)
- 6GB PC3-10600 DDR3 ECC RAM 1333MHz (Mid 2010, Mid 2012)
- 12GB PC3-10600 DDR3 ECC RAM 1333MHz (Mid 2012)

New Features:
- Intel Processors
- Improved Graphics
- Improved Cooling