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Intel® Xeon®

2.66GHz X5550 Processor

4-Core / 8 Thread / 8MB Cache / 95W / Socket LGA1366

System Pull Mac Pro 2009 | Fully Tested

The Intel Xeon processor 5500 series, based on the latest-generation Intel microarchitecture codenamed Nehalem, represents the next step in energy efficiency, performance and virtualization with an integrated memory controller. The platform provides key embedded features such as extended life cycle support and options for thermally constrained applica- tions, while maintaining compatibility with enterprise platform configurations. Based on 45nm process technology, processors can deliver up to 1.5x more performance within the same thermal design power (TDP) over the previous-generation Intel Xeon processor 5400 series for embedded computing.
The Intel Xeon processor 5500 series features new Intel QuickPath Technology and Intel Turbo Boost Technology which, along with Intel Hyper-Threading Technology, deliver top performance for bandwidth-intensive applications. Also included is Intel Virtualization Technology for flexible virtualization.

Product Specifications:

Intel Part Number

  • W5550

Clock Speed

  • 32.66GHz base
  • 3.06GHz turbo


  • 4 cores
  • 8 threads

Intel QPI Speed

  • 6.4GT/s

# of QPI Links

  • 2

Sockets Supported

  • FCLGA1366

Cache Size

  • 8MB


  • 95W

Supported RAM Speed

  • DDR3-800
  • DDR3-1066
  • DDR3-1333


  • 45nm

Intel Hyperthreading

  • Yes

Intel Virtualization Technology

  • Yes

64-Bit Architecture

  • Yes

Thermal Monitoring Technologies

  • No


  • AS-IS: No Returns
Manufacturer provided specifications for Intel p/n BX80602X5550 UPC#: 735858205719
This product is compatible with... Learn how to find your Mac's model ID
Mac Pro
Mac Pro 12-Core
(Mid 2010-2012)
(July, 2010 / June 2012)
Model ID: MacPro5,1
2.40GHz, 2.66GHz, 2.93GHz, 3.06GHz
Mac Pro
Mac Pro 8-Core (Mid 2010)
(July, 2010)
Model ID: MacPro5,1
Mac Pro
Mac Pro 6-Core
(Mid 2010-2012)
(July, 2010 / June 2012)
Model ID: MacPro5,1
Mac Pro
Mac Pro (Mid 2010 Quad-Core)
(July, 2010)
Model ID: MacPro5,1
2.8GHz, 3.2GHz, 3.33GHz
Mac Pro
Mac Pro (Early 2009 8-Core)
(March, 2009)
Model ID: MacPro4,1
2.26GHz, 2.66GHz, 2.93GHz
Mac Pro
Mac Pro (Early 2009 Quad-Core)
(March, 2009)
Model ID: MacPro4,1
2.66GHz, 2.93GHz, 3.33GHz
PC Servers
PC Servers
Compatible with Intel / AMD Process based servers capable with the specifications listed above.
PC Desktop
PC Desktops
Compatible with Intel / AMD Process based PCs capable with the specifications listed above.
Intel 2.66GHz Xeon X5550 Processor Mfr P/N: BX80602X5550 OWC SKU: ITLBX80602X5550 Pull from Mac Pro 2009 Nehalem 8-Core, Fully Tested - NO RETURNS As Is. No Warranty.
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