661-5046 Mac Pro (Early 2009 8-Core) Processor 2.66 GHz for Mac Pro NB-5153W
This is a set of two quad-core 2.66GHz processors for the Mac Pro (Early 2009). Together they make up the 8-core processing core.
Apple part number: 661-5046
Mac Pro (Early 2009)
661-5046 Mac Pro (Early 2009 8-Core) Processor 2.66 GHz for Mac Pro