Apple Mac Pro 2.66GHz Dual-Core Xeon (MA356LL/A) compatible Black Diamond memory 4GB DDR2 FBDIMM 667MHz. Compatible computer model: Apple Mac Pro MB871BZ/A Intel Xeon 2.66 GHz, MA356ZP/A, 2.0GHz Quad Core, MA356J/A, 2.8GHz Quad Core, MA356TH/A, 2.66GHz Dual-Core Xeon (MA356LL/A), 3.0GHz Quad Core, A1186, MA356D/A, MA356LL/A (Quad Core 2.66GHz) Black Diamond Memory offers the most extensive line of memory solutions today. With our decades of experience specializing in memory, Black Diamond Memory is a proven manufacturer to the semiconductor industry. Our great products combined with our world class service and support have helped us to where we are today. When you have an Black Diamond memory chip, you can count on it being the best available memory for your system. Our system specific Branded Memory line delivers in performance, and is designed to be guaranteed in compatibility with your system. Each of our memory chips come with a lifetime warranty for your peace of mind. Use our Upgrade Configurator to easily find the correct memory module for your system.