Asus Servers RS500A-S6/PS4 compatible Black Diamond memory 4GB DDR3 ECC UDIMM 1066MHz. Compatible computer model: Asus Servers ESC700 G2, ESC2000 Personal SuperComputer, ESC1000 Personal SuperComputer, RS100-E7/PI2, RS700-X7/PS4, ESC4000/FDR G2, RS520-E6/ERS8, TS100-E6/PI4, RS500A-S6/PS4, RS700DA-E6/PS4, RS704D-E6/PS8, RS700-E7/RS8, RS920-E7/RS8, ESC1000 G2, RS500A-E6/PS4, ESC4000, ESC2000 G2, TS300-E6/PS4, RS926-E7/RS8, RS724Q-E6/RS12, TS300-E7/PS4, RS704DA-E6/PS4, RS500A-X6/PS4, RS700-E6/ERS4, RS920A-E6/RS8, RS924A-E6/RS8, TS700-E7/RS8. 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.