IBM Netfinity 7100 8666 compatible Black Diamond memory 256MB SDRAM ECC Registered RDIMM 100MHz. Compatible computer model: IBM Netfinity 5500 (8660-4xx), 6000R 8682-2RY, 8500 8681-4RY, 5000 8659, 5500 (8660-7xx), 5500 M20 8662, 7100 8666-41Y, 3500 M10 11Y, 3500 M10 32Y, 5100 8658-1RY, 5100 8658-11Y, 7100 8666-31Y, 7600 8665-1RY, 7100 8666-1RY, 4500R 8656-1RY, 5500 8660, 7100 8666-3RY, 5100 8658-51Y, 6000R 8682-1RY, 7100 8666-4RY, 3500 M10 22Y, 8500R 4RY, 1000 8477-51Y, 5100 8658-5RY, 7100 8666, 5100 8658-3RY, 8500 8681-xxx (4RY - 8RY), 8500R 8681-xxx (4xx - 8xx), 5500 M10 8661, 1000 8477-61Y, 4000R 8652-11Y, 5500 (8660-1xx), 3000 8476, 4500R 8656-4RY, 5500 (8660-5xx), 8500 8681-5RY, 7600 8665-2RY, 4000R 8652-22Y, 7100 8666-21Y, 4500R 8656-2RY, 4500R 8656-3RY, 7100 8666-2RY, 7100 8666-11Y, 4000R 8652-21Y, 5100 8658-2RY, 5100 8658-41Y, 7600 8665-4RY, 7600 2RY, 8500 8681-6RY, 5500 Series, 8500R 6RY, 6000R 8682, A100 8652, 5100 8658-21Y, 3500 M10 12Y, 1000 8477-42Y, 4500R 8656-5RY, 5100 8658-4RY, 7600 8665-5RY, 7600 8665-3RY, 8500R 5RY, 7600 1RY, 5100 8658-31Y, 1000 8477, 3500 M10 31Y, 5500 (8660-6xx). 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.