The front panel of today’s PC case uses multiple fan and mesh designs, which may destroy the integrated visual appearance, after our designers developed a new structural method, under good cooling performance conditions, the outline of the PC case can be presented intuitively and the comfortable way. i400 is the first ATX case of JONSPLUS, which meets our definition of the “i series” Under reasonable size control, the i400 can accommodate E-ATX motherboard and 340 graphics cards, and up to 6 x 3.5” HDD storage space to meet the needs of content creators. The space for push and pull fan setup for 360 radiator (or support of 168mm height flagship air cooler), and from bottom to top’s vertical air flow to remove the heat from hardware. With the development of PC software and hardware, graphics cards play an increasingly important role in PC gaming or design rendering. In actual use, we found that the traditional bottom-mounted + enclosed power supply compartment structure will block the airflow to graphics card. As a result, when the graphics card heats up, the fan speed will increase accordingly and increase the noise level; and the i400 has front-mounted power supply design, the cooling fans at the bottom can directly blow the graphics card, forming a good vertical air circulation. For heavy loading work projects based on GPU rendering, the i400 can continue to provide a good and stable working environment for the graphics card.