Kit Capacity: 96GB. The 8 Core model the Ram will only run @ 1066Mhz. If however you were to upgrade and install a CPU that was capable of running 1333Mhz ram, the ram would then run at 1333Mhz, its a very useful dormant feature that you can enable in the future when upgrading your CPU.
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Your Mac Pro has 8 slots and the maximum possible upgrade is 128GB (8x16GB). Kit Capacity: 128GB. However with a four slot machine like yours this is not an issue as you need to remove all of the existing ram to upgrade, but its worth knowing about.
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Total Capacity: 24GB. INSIDE YOUR MAC PRO QUAD CORE. below is link that shows every compatible Xeon CPU, its details each CPU and its maximum supported ram size/speed. Quad Core Model: 2.66Ghz / 2.93Ghz / 3.33Ghz.
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The only way to check this is by manually looking at your modules. However with a four slot machine like yours this is not an issue as you need to remove all of the existing ram to upgrade, but its worth knowing about.
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Your Mac Pro has 4 slots and the maximum possible upgrade is 56GB (3x16GB + 1x8GB) or 64GB (4x16GB) depending on what CPU you have installed . Total Capacity: 48GB. Quad Core Model: 3.20Ghz. below is link that shows every compatible Xeon CPU, its details each CPU and its maximum supported ram size/speed.
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Form Factor: RDIMM. Mac Pro can use either RDIMM or LRDIMM, but they cannot be combined. Size: 32GB (32GB x 1). PC Speed: PC-23400. Pin Count: 288-pin. Timing: CAS = 21.0 21-21-21-14.32.
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TYPE/INTERFACE: 7MM SATA 3 SPEED:READ 500MB/s - WRITE 450MB/s. Mac Pro "Eight Core" 2.26 (2009/Nehalem). Mac Pro "Eight Core" 2.66 (2009/Nehalem). Mac Pro "Eight Core" 2.93 (2009/Nehalem). Mac Pro "Quad Core" 2.66 (2009/Nehalem).
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8GB DDR3 1333MHz memory module designed specifically for the Mac Pro 8-core and Quad-core Xeon systems. With ECC Error Correction and Apple Specified Thermal Sensor. 240 pins, timings of 9-9-9-24 (CL9) at 1.5V.
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