Lenovo ThinkPad W510 Series compatible 4GB 1333MHz DDR3 SO-DIMM Black Diamond memory. Compatible computer model: Lenovo ThinkPad Edge E125, L512 2598, T420si, L530, Edge E325, X230, SL420, X121e, Edge E120, X210t, W510 Series, Edge E420, SL520, Edge E520, W701ds 2500, X210, Edge E220s, X220i Tablet, Edge E420s, Edge E425, L412 4403, T520i, X130e, Edge E525, L412 0585, L512 4447, W510 4876, T500 2081, W710, W701 Series, X210s, L412 0530, X220i, Edge E320, L512 4444, T420, L512 2599, L512 2550, Edge E530, L412 0591, L520, T420i, L412 4404, X220 Tablet, W701 2544, Edge E430, L412 0553, W701ds Series, L512 2597. 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.