661-4687 Quad Core Processor 2.8 GHz for Mac pro NB-5151W
This is the Processor Quad Core 2.8 GHz for the Mac Pro.
Apple part number: 661-4687
Mac Pro (Early 2008)(A1186-Early 2008-MA970LL/A), 3.0GHz 2008), 3.2GHz Quad-Core Models Related Numbers Family
661-4687 Quad Core Processor 2.8 GHz for Mac pro