A Closer Look - Inside

To access the interior of the MasterBox TD300 Mesh, simply remove the thumb screws holding each panel in place. The interior is black, and Cooler Master includes grommets, which is weird as the MB311L ARGB, a case that uses the same body, did not. On top of the shroud are two mounting positions for 2.5" drives, which can easily be seen when looking at the internals through the windowed side.


The backside holds an ARGB controller PCB that also acts as a PWM fan hub. It is interfaced with the reset button on top of the chassis. The MasterBox TD300 Mesh has plenty of zip-tie hooks for easy and clean cable management. There are two 2.5" hard-drive mounting locations here for drives you don't want to show off. However, Cooler Master does not include enough mounting hardware to fill all four of these locations—you have to make do with picking two.


The PSU bay underneath the shroud is pretty basic, with foam tips to minimize and absorb vibrations before they reach the chassis frame. Above that are the four expansion slots. Two of the covers are unfortunately of the breakout kind, with the top two protected by removable covers and classic screws. The very top has room for a height-adjustable 120 mm fan.


Last but not least are two additional 3.5" hard-drive bays underneath the shroud, which brings the total up to four possible storage drives. Above that, in the front, it is all about cooling. You may install an additional 120 mm fans on top of the two ARGB units or place a 360 mm radiator in the front without sacrificing any expandability.


In the ceiling are clearly visible mounting holes for fans or a radiator. Watch out if using a thick 280 mm radiator as it may clash with components on the installed motherboard. However, if going that route, odds are you will spend more on a chassis as well. As with modern Cooler Master cases, the MasterBox TD300 Mesh top panel is removable for easier assembly of both the internal components and any cooling you may want to install in the ceiling.


All the cables within the Cooler Master MasterBox TD300 Mesh are of the default variety and completely black with the exception of the white fan connector. You will also find a pre-installed ARGB splitter which combines the leads from the fans into a single plug for your motherboard or the separately included controller.