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Upgrade the memory in select 2009-2010 Mac Pro systems or compatible PCs using the 16GB DDR3 1066 MHz UDIMM Memory Kit from OWC / Other World Computing. This memory kit features a total capacity of 16GB, which is made up of two 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.