Dell OptiPlex 200 (RDRAM) 733 SFF & 1.0GHz, Optiplex GX200 1.0G, GX200 600, GX200 667 compatible Black Diamond memory 1GB 2X512MB Rambus RDRAM RIMM 800MHz. Compatible computer model: Dell OptiPlex GX300 733, GX200 800, GX300 866, GX200 866, GX200 933, GX300 533, GX300 800, GX300 600, GX400, GX200 733, GX300 1.0G, Optiplex GX200 1.0G, GX300 667, GX200 600, GX300 933, GX200 667, 200 (RDRAM) 733 SFF & 1.0GHz. 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. Please keep in mind that this memory will ONLY work on the models listed above. 15% Restocking fee will apply for non-defective items.