Be Quiet Dark Base 900 Silver ATX Case Outstanding Flexibility and Silence be quiet! Dark Base 900: unrivaled flexibility with impeccable cooling and silence features. It was designed for high-end enthusiasts and individualists - all of those who expect the highest standards when it comes to modularity, compatibility and design for their high-end workstations as well as overclocked and silent water-cooled systems. Dark Base 900 has numerous modularity options to satisfy every desire with lots of features to support special configurations. Aluminum surfaces and steel offer highest stability with a look of extreme elegance. Simply an engineering work of art! Fully versatile thanks to modular construction, offering an relocatable motherboard tray, repositionable HDD slots, support for even E-ATX and XL-ATX as well as the possibility of an inverse layout Three pre-installed Silent Wings 3 140mm PWM fans featuring a smooth-running 6-pole motor, fluid-dynamic bearing and funnel-shaped air inlets Effective full circuit airflow system with innovative noise-reducing vents all around the case Completely sound insulated case with decoupled elements for motherboard, power supply and drives Four areas for water cooling radiators up to 420mm on top, front, back and base of the case 2-in-1 side panel vent can be closed for silent operation or opened for two additional fans Specidfications Model DARK BASE 900 | SILVER General Data PSU form factor ATX PS/2 Motherboard compatibility E-ATX, XL-ATX, ATX, M-ATX, Mini-ITX Case size excl. stands (L x W x H), (mm)- Case size incl. stands (L x W x H), (mm) 577 x 243 x 585 Dimensions side panel window (L x W), (mm)- Color option Silver Weight (kg) 14. 18 USB 2. 0: 2 USB 3. 0: 2 HD Audio I/O 1 Expansion slots 8 Fan mounting locations 12 Qi charger- RGB LED illumination- Material Covers ABS, Aluminium Side panel Steel, ABS Side panel window- Front panel ABS, Aluminium Stands ABS Drive Bay Capacity 5. 252 3. 57 2. 515 HDD Cage Specifications HDD cages total