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Upgrade the memory in select 2009-2010 Mac Pro systems or compatible PCs/servers using the 48GB DDR3 1066 MHz UDIMM Memory Kit from OWC / Other World Computing. This memory kit features a total capacity of 48GB, which is made up of six 8GB modules. It features a clock speed of 1066 MHz, a bus speed of PC-8500, and a 240-pin UDIMM form factor. It operates using 1.5V, 7-7-7-20 timings, a component configuration of 1024M x 72, and a module bandwidth of 8.5 GB/s. By offering ECC (Error Checking and Correcting) technology, this RAM will help your workstation encounter fewer errors that can corrupt data sets and introduce system issues. Additionally, this memory module is compatible with Apple Specified Thermal Sensor, which ensures that the RAM maintains a safe thermal operating range.
To utilize over 32GB of memory in your Mac Pro using 10.6.x or greater, you must boot into 64-bit mode. In 32-bit mode, all installed memory will show in system profiler, but only up to 32GB will be actively used by the computer.
Mac Pro (March 2009)
Model ID: MacPro4,1
Eight-Core: 2.26 GHz, 2.66 GHz, 2.93 GHz