be quiet! Dark Base 900 Desktop Black,Orange.Outstanding flexibility and silence be quiet! Dark Base 900 Orange is the perfect case for all of those who expect the highest standards when it comes to modularity, compatibility and design. – Relocatable motherboard tray with the possibility of an inverse layout – Repositionable HDD tray with single HDD slots for individual space requirements – Three pre-installed, virtually inaudible be quiet! SilentWingsÂ® 3 140mm PWM fans – Manual stepless fan controller supports up to three PWM and three 3-pin fans – Effective full-circuit airflow system with noise-reducing vents all around the case – Water cooling ready for radiators up to 420mm on top, front, back and base – Completely sound insulated with decoupled elements for motherboard, power supply and drive slots – Three years manufacturerâ€TMs warranty – German product conception, design and quality control be quiet! Dark Base 900 Orange offers unrivaled flexibility with impeccable cooling and silence features. Simply an engineering work of art!