Lenovo ThinkPad R40 2684 compatible 512MB 266MHz DDR SO-DIMM Black Diamond memory. Compatible computer model: Lenovo ThinkPad R40e 2682, T40 2373, R40 2722, T40 2374, T30 2367, T30 2366, R32 2659, G40 2384, R40 2682, R40 2683, T40p 2374, R40e 2896, R40e 2681, R40e 2683, R40e 2684, T40 2379, A31p 2654, R40 2724, R32 2658, T40 2378, A31p 2653, R40 2684, A31 2652, R40 2681, R40 2723, A31 2653, R40 2892, R40 2685, G40 2389, T40p 2373. 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.