X5690 661-6642 Two CPUs Dual Processor 6 Core Xeon A1289 for Mac Pro (Mid 2010-2012) NB-5610W
This is a replacement processor for the Mac Pro from Mid 2010.
Apple part number: 661-6642
Compatible models: Mac Pro (Mid 2012), A1289
661-6642 3.06GHz Dual Processor A1289 for Mac Pro (Mid 2012)
6 Core Xeon X5690