Apple 2009 Mac Pro 5,1 CPU Tray, Xeon X5675 3.06Ghz 6-Core with 64GB 1333MHz RAM
The Xeon X5675 3.06GHz CPUwill permit utilising the full speed of the 1333MHz RAM, and this will make it one of the fastest single-CPU classic Mac Pros possible. IMPORTANT NOTE: this tray MUST be installed in a 2009 Mac Pro 5,1 model.