Dell OptiPlex Optiplex 755 Ultra SFF, 620 (Ultra SFF), 755 Ultra-Small form Factor, 755 Energy Smart compatible Black Diamond memory 2GB DDR2 DIMM 667MHz. Compatible computer model: Dell OptiPlex 330, 760 Ultra Small Form Factor (USFF), FX160, 745, 755 Small Form Factor, 740n, 745 USFF, 760 Desktop, 745c, 755 Mini Tower, 760 Mini-Tower, 755 Desktop, 620 (Ultra SFF), 740, Optiplex 755 Ultra SFF, 755 Ultra-Small form Factor, Optiplex 755 MiniTower, 330 Desktop, Optiplex 755, 745 Ultra Small Form Factor, 755 Ultra Small Form Factor, 760 Small Form Factor (SFF), 755, 330n, 745 MiniTower, 745 Small Form Factor, 330 Mini Tower, 760 USFF, 745 Energy Smart, 755 Energy Smart. 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.