Processing - 8-core: Two 2.26GHz, 2.66GHz, or 2.93GHz Quad-Core Intel Xeon 5500 series processors
- Quad-core: One 2.66GHz, 2.93GHz, or 3.33GHz Quad-Core Intel Xeon 3500 series processor
- Next-generation Intel microarchitecture
- 8MB of fully shared L3 cache per processor
- Integrated memory controller
- Turbo Boost dynamic performance (up to 3.33GHz on 8-core 2.93GHz system, up to 3.6GHz on quad-core 3.33GHz system)
- Hyper-Threading technology for up to 16 virtual cores
- 128-bit SSE4 SIMD engine
- 64-bit data paths and registers
- Optimized for energy efficiency
1066MHz DDR3 ECC SDRAM - 8-core: Eight memory slots (four per processor) supporting up to 32GB of main memory using 1GB, 2GB, or 4GB DIMMs
- Quad-core: Four memory slots supporting up to 16GB of main memory using 1GB, 2GB, or 4GB DIMMs
Graphics and displays- Double-wide, 16-lane PCI Express 2.0 graphics slot with one of the following graphics cards installed:
- NVIDIA GeForce GT 120 with 512MB of GDDR3 memory, PCI Express 2.0, one Mini DisplayPort, and one dual-link DVI port
- ATI Radeon HD 4870 with 512MB of GDDR5 memory, PCI Express 2.0, one Mini DisplayPort, and one dual-link DVI port
 - Multiple graphics card configurations available with two, three, or four NVIDIA GeForce GT 120 cards
- Support for up to eight 30-inch displays 1
- Support for digital resolutions up to 2560 by 1600 pixels
- Support for analog resolutions up to 2048 by 1536 pixels
- Video adapters available for:
- 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)
Storage- Four 3.5-inch cable-free, direct-attach hard drive bays with built-in independent 3Gb/s Serial ATA channels; four internal hard drive carriers included
 Up to 8TB of internal storage3 in hard drive bays 1 through 4 using hard drives in the following capacities: - 640GB Serial ATA 3Gb/s, 7200 rpm, 16MB cache
- 1TB or 2TB Serial ATA 3Gb/s, 7200 rpm, 32MB cache
- Optional Mac Pro RAID Card with 512MB cache and 72-hour cache battery backup
- 18x SuperDrive with double-layer support (DVD±R DL/DVD±RW/CD-RW)
- Writes DVD+R and DVD-R discs at up to 18x speed
- Writes DVD+R DL and DVD-R DL discs at up to 8x speed
- Writes DVD+RW discs at up to 8x speed
- Writes DVD-RW discs at up to 6x speed
- Reads DVDs at up to 18x speed
- Writes CD-R and CD-RW discs at up to 32x speed
- Reads CDs at up to 32x speed
- One open optical drive bay for optional second SuperDrive
Connections and audio - 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
PCI Express expansion- Three open full-length PCI Express expansion slots5
- One PCI Express 2.0 x16 slot
- Two PCI Express 2.0 x4 slots
- All slots provide mechanical support for 16-lane cards
- 300W combined maximum for all PCI Express slots
Software - Mac OS X v10.6 Snow Leopard (includes iTunes, Time Machine, Quick Look, Spaces, Spotlight, Dashboard, Mail, iChat, Safari, Address Book, QuickTime, iCal, DVD Player, Photo Booth, Front Row, Xcode Developer Tools)
- iLife (includes iPhoto, iMovie, iDVD, iWeb, and GarageBand)
You can also have the following software preinstalled, only at the Apple Online Store: - iWork
- Final Cut Express
- Aperture
- Logic Express
- FileMaker
- MobileMe
Size and weight- Height: 20.1 inches (51.1 cm)
- Width: 8.1 inches (20.6 cm)
- Depth: 18.7 inches (47.5 cm)
- Weight (standard configuration):
- 8-core: 41.2 pounds (18.7 kg)6
- Quad-core: 39.9 pounds (18.1 kg)6
In the box - Mac Pro
- Power cord
- Apple Keyboard with Numeric Keypad and Apple Mouse
- USB keyboard extension cable
- Install/restore DVDs
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