IBM ThinkPad R Series R50 1830W14 compatible 256MB 333MHz DDR SO-DIMM Black Diamond memory. Compatible computer model: IBM ThinkPad R Series 2897B4U, 18299MG, R51 ( Type 2883ARU ), R51 Series, R51 (Type 2895), 27233XU, R40e (Type 2685), 28838QU, R50p (Type 1833), R51 ( Type 2888 ), R40 (Type 2898), R50e Series, R40 (Type 2723), R50 1830W14, R40e (2684MA3), 289783U, R50e (1834U3G), R50e (Tyep N834), 2684N3H, R51 (Type 1831), 2684AA5, R51 (Type N887), 1830BLU, R51 (28832ZU), R51 (Type 1836), R50 (Type 1830), 18307DU, 2684H8U, R51 (Type 2887), R40e (Type 2684), R50e (Type1834), R50p (Type 1832), R40e (Type N684), R50 (Type 1836), 27233LU, R50, R40 (Type 2897), R51 (Type 1830), R50 (Type 1829). 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.