We have been keeping an eye on the MasterBox Q300 series ever since Cooler Master announced it back at the CES 2018 show in January. According to Cooler Master, size, build potential, portability, and modularity, are what the MasterBox Q300 PC case series is all about and despite their mATX design with support for mATX motherboards, both the Q300P and the Q300L will also come with support for standard ATX power supply units as well as a 240mm front-mounted radiator, allowing them to house high-end PC systems.
Modularity was also an important aspect in the Q300 series design and these come with an ability to place the I/O panel in a total of six different locations, depending on the need and can be used in both horizontal and vertical position.
Measuring at 387 x 230 x 378mm, the MasterBox Q300P uses steel and plastic materials, have RGB lighting, and comes with four removable handles, which make it a neat LAN party gaming system PC case. It also comes with edge-to-edge side panel, plenty of cable routing space has four expansion slots and has room for single 3.5-inch and two 2.5-inch drives. It supports up to 157mm tall CPU cooler, up to 160mm long PSU and up to 360mm long graphics cards.
When it comes to cooling, the MasterBox Q300P comes with three pre-installed fans, two 120mm RGB LED fan at the front and 120mm fan at the rear. It also supports up to two 120mm at the top and one 120mm at the bottom. It supports up to 240mm radiator at the front and one 120mm radiator at the rear.
The MasterBox Q300L is a bit of a different beast as it more focuses on style, with patterned magnetic dust filters at the front and top but also comes with an edge-to-edge side panel.
Measuring at 450 x 230 x 450mm, the MasterBox Q300L has pretty much the same specifications as the Q300P and has the same support for the CPU cooler, PSU, and the GPU.
The MasterBox Q300L comes with a single pre-installed fan at the rear and supports two 120/140mm at the front, two 120mm at the top, and additional 120mm at the bottom. The support for liquid cooling radiators is the same, with 240mm at the front and 120mm at the rear.