Processor: 3.2GHz Quad-Core Intel Xeon 8MB fully shared L3 cache
Display: Can be set with any monitor, Up to two HD 30-inch  Cinema Display
Memory: 6GB (three 2GB DIMMs) of 1066MHz DDR3 ECC SDRAM
Hard Drive: 1TB Serial ATA (3Gb/s); 7200 rpm
Optical Drive: 18x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW)
Graphics:  ATI Radeon HD 5770 with 1GB GDDR5 memory, two Mini DisplayPort outputs, and one dual-link DVI video output
Video: Additional DVI output using Mini DisplayPort to DVI Adapter (optional), Additional dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (optional), VGA output using Mini DisplayPort to VGA Adapter or DVI to VGA Display Adapter (optional)
Ports:  Four FireWire 800 ports (two on front panel, two on back panel), Five USB 2.0 ports (two on front panel, three on back panel), Two USB 2.0 ports on included keyboard, Front-panel headphone minijack and internal speaker, Optical digital audio input and output TOSLINK ports, Analog stereo line-level input and output minijacks, Multichannel audio through Mini DisplayPort.
Communication: Built-in AirPort Extreme 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 2.1 + Enhanced Data Rate (EDR) wireless technology, Two independent 10/100/1000BASE-T Ethernet (RJ-45) interfaces with support for jumbo frames
Operating System: Mac OS X Lion
KeyBoard/Mouse: Apple Keyboard with Numeric Keypad and Magic Mouse
Weight: 18.1 kg

Processor: 3.2GHz Quad-Core Intel Xeon 8MB fully shared L3 cache
Display: Can be set with any monitor, Up to two HD 30-inch  Cinema Display
Memory: 8GB (Four 2GB DIMMs) of 1066MHz DDR3 ECC SDRAM
Hard Drive: Two 1TB Serial ATA (3Gb/s); 7200 rpm
Optical Drive: 18x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW)
Graphics:  ATI Radeon HD 5770 with 1GB GDDR5 memory, two Mini DisplayPort outputs, and one dual-link DVI video output
Video: Additional DVI output using Mini DisplayPort to DVI Adapter (optional), Additional dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (optional), VGA output using Mini DisplayPort to VGA Adapter or DVI to VGA Display Adapter (optional)
Ports:  Four FireWire 800 ports (two on front panel, two on back panel), Five USB 2.0 ports (two on front panel, three on back panel), Two USB 2.0 ports on included keyboard, Front-panel headphone minijack and internal speaker, Optical digital audio input and output TOSLINK ports, Analog stereo line-level input and output minijacks, Multichannel audio through Mini DisplayPort.
Communication: Built-in AirPort Extreme 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 2.1 + Enhanced Data Rate (EDR) wireless technology, Two independent 10/100/1000BASE-T Ethernet (RJ-45) interfaces with support for jumbo frames
Operating System: Mac OS X Lion Server
KeyBoard/Mouse: Apple Keyboard with Numeric Keypad and Magic Mouse
Weight: 18.1 kg

Processor: Two 2.4GHz 6-Core Intel Xeon (12- Core) 12MB fully shared L3 cache per processor
Display: Can be set with any monitor, Up to two HD 30-inch Cinema Display
Memory: 12GB (six 2GB DIMMs) of 1333MHz DDR3 ECC SDRAM
Hard Drive: 1TB Serial ATA (3Gb/s); 7200 rpm
Optical Drive: 18x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW)
Graphics:  ATI Radeon HD 5770 with 1GB GDDR5 memory, two Mini DisplayPort outputs, and one dual-link DVI video output
Video: Additional DVI output using Mini DisplayPort to DVI Adapter (optional), Additional dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (optional), VGA output using Mini DisplayPort to VGA Adapter or DVI to VGA Display Adapter (optional)
Ports: Four FireWire 800 ports (two on front panel, two on back panel), Five USB 2.0 ports (two on front panel, three on back panel), Two USB 2.0 ports on included keyboard, Front-panel headphone minijack and internal speaker, Optical digital audio input and output TOSLINK ports, Analog stereo line-level input and output minijacks, Multichannel audio through Mini DisplayPort.
Communication: Built-in AirPort Extreme 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g
compatible, Bluetooth 2.1 + Enhanced Data Rate (EDR) wireless technology, Two independent 10/100/1000BASE-T Ethernet (RJ-45) interfaces with support for jumbo frames
Operating System: Mac OS X Lion
KeyBoard/Mouse: Apple Keyboard with Numeric Keypad and Magic Mouse
Weight: 18.7 kg