4GB DDR3 1066MHz PC3-8500 240Pin 512MX72 ECC Non-Registered Memory for Quad Core and 8-Core Mac Pro System 2010-2012.
This memory is compatible with 2010-2012 Quad-core/8-core 2.4GHz/2.8GHz/3.2GHz:
Total Number of slots: 4 slots(Quad core) & 8slots(8-core)
Maximum Memory: up to 48GB (Quad core) & Up to 128GB Total Memory for 8-core
Maximum Memory/Slot : 16GB
*Must Upgrade using Matched Pairs
Supports 72Bit DDR3 240 Pin ECC Non-Registered memory sticks
Apple Mac Pro "Nehalem" & "Westmere" models utilize high-performance multi-channel memory addressing that benefits from the installation of matched memory sets.
One of the major brands like Crucial, Micron, Samsung, Kingston, Corsair, etc.
Note: Depending on availability, the shipped item's condition could be New, Used, Refurbished, Pulled or OEM.