Dual Built-in 200mm 5V ARGB Case Fans Preinstalled with two 200mm 5V ARGB front fans featuring hydraulic bearing, 9 addressable LEDs & 16.8 million-colour illumination to guarantee high airflow & custom system designs to show off your PC design skills. One Click, Switching the Mode The 5V ARGB fans can be controlled using a simple interface built into the I/O panel that cycles through 7 different lighting modes & a range of different colour options. Tt LCS Certified Tt LCS Certified is a Thermaltake exclusive certification applied to only products that pass the design & hardcore enthusiasts standards that a true LCS chassis should be held to. The Tt LCS certification was created so that we at Thermaltake can designate to all power users which chassis have been tested to be best compatible with extreme liquid cooling configurations to ensure you get the best performance from the best features & fitment. Angular, Mesh Front Panel Expanded from the gaming spirit of the classic Commander MS-I chassis, the uniquely design full mesh panel optimized airflow. With its modern design & high performance, it is the best choice for both gamers & enthusiasts. Riser GPU Support Bracket Specially designed for dual GPU placement options, Commander C Series has the support for vertical graphic card layout with dual PCI-E slots design. Integrated riser GPU support bracket not only prevents the graphic card from sagging, but also helps to reduce the weight on the motherboard PCI-E slots. Built-in PSU Cover Equipped with a PSU cover with a ventilated design to improve airflow & hide those unsightly cables. Seamless Tempered Glass Panel The tempered glass side panel of the Commander C31 is built to be more durable & scratch resistant than older acrylic panels. Superior Hardware Support The Commander C31 has outstanding expandability with support for a tower CPU cooler with maximum height 180mm, a dual expansion slot VGA of up to 310mm in length with reservoir, & a power supply with length of up to 200mm. Excellent Cooling Capability Optimized for excellent cooling capability with two 200mm 5V ARGB front fans & one 120mm standard rear fan. The case is able to house up to two 200mm, two 140mm or three 120mm front fans, up to two 140mm fans on top to allow users build a complete high-end system. Handy I/O Ports Dual 3.0 USB (Universal Serial Bus) ports on top-front panel to grant direct access when needed. As well as an ARGB button for controlling 7 lighting modes of ARGB fans.