661-5002 1 GB, DDR3 1066, UDimm, ECC - Mac Pro Early 2009 A1289 NB-2215W
This is 1GB DDR3 PC3-8500 RAM upgrade for the Mac Pro. This is for PC3-8500 DDR3 Machines. These are DIMM chips and not SODIMM chips used in MacBooks and iMacs.
Apple part number: 661-5002
Compatible models: A1289-Early 2009-MB871LL/A, A1289-Early 2009-MB535LL/A, A1289-Early 2009, A1289-Early 2009
Compatible Mac info. : 2.66GHz-2.93GHz-3.33GHz Quad-Core Mac Pro , 2.26GHz 8-Core Mac Pro , 2.66GHz 8-Core Mac Pro , 2.93GHz 8-Core Mac Pro
661-5002 1 GB, DDR3 1066, UDimm, ECC - Mac Pro Early 2009 A1289