IBM ThinkPad T Series T42p Series compatible 512MB 333MHz DDR SO-DIMM Black Diamond memory. Compatible computer model: IBM ThinkPad T Series T42p (Type 2374), T41p (Type 2374), T40 (Type 2378), T41p (Type 2379), T42 (Type 2373), T40 (Type 2373), 2373G3G, T40 (237314U), T40p (Type 2373), T42p (Type 2373), T41 (Type 2378), T40-2375, T40 (Type 2374), T42p Series, 2373GEU, 2373313, T41p (2373GEU), T41 (Type N373), T42 (Type 2378), T42 (Type 2374), T42p (Type 2379), T41 23737JU, T42 (Type 2376), T42p (Type 2363), 2373G1M, T41 (Type 2374), 23734WU, 23733HU, T42p (Type 2378), T41 (Type 2373), T42 Series, T41p (Type 2373), T40 (Type 2379), T42 (Type 2379), T41(Type 2379), 2373315, 2373BU3. 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.