Key FeaturesC 90 Rotatable HDD Cage Whisper-Quiet (is less than 25dB) Kensington Lock Support Front I / O Supports 2x USB 3.0 1x Optional Front Intake 8cm (2800 RPM) PWM Fan Mini-Tower Chassis Supports Micro-ATX Motherboard, Size 9.6 x 9.6 400W Gold Level Certified High-Efficiency Power Supply 1x Rear 9cm (2050 RPM) PWM Fan 2x 5.25 External HDD Drive Bays & 4x 3.5 Internal HDD Drive Bays Form FactorC Mini-Tower Chassis - supports for maximum motherboard sizes of 9.6 x 9.6 Processor SupportC Dual Intel and AMD processors Available ColorC Black Expansion SlotsC 4 full-height and full-length expansion slot(s) Drive BaysC 2 x 5.25 drive bay 4 x 3.5 fixed drive bay Front PanelC ButtonsC Power On / Off button LEDsC 1 Network Activity LEDs HDD activity LED Power LED System Overheat LED Ports 2x USB 3.0 Port(s) Systems CoolingC FansC 1 x 9cm (2050 RPM) rear exhaust fan(s) Optional 1 x 8cm (front) cooling fan Operating Environment (System) C Operating Temperature RangeC 5 o C - 35 o C (41 o F - 95 o F) Non-Operating Temperature RangeC -40 o C - 70 o C (-40 o F - 158 o F) Operating Relative Humidity RangeC 8% - 90% (non-condensing) Non-Operating Relative Humidity RangeC 5% - 95% (non-condensing) Power SupplyC 400W ATX / PS2 Multi-output Power Supply Power EfficiencyC 90% Total Output Power and InputC 400W with Input 100 - 240Vac AC Input FrequencyC 50-60Hz Output TypeC 24pin ATX -12VC Max: 0.37A / Min: 0A +12VC Max: 12.62A / Min: 0.05A (100Vac - 240Vac) Max: 12.62A (100Vac - 240Vac) +5VC Max: 8.75A / Min: 0.2A