Cooler Master NSE 300 Tower Chassis ATX MicroATX

The Cooler Master NSE 300 is a mid-tower chassis built around practical functionality for system builders who care more about airflow and expandability than flashy aesthetics. Supporting both ATX and microATX motherboards, the NSE 300 offers a spacious interior with room for graphics cards up to 320mm long and CPU coolers up to 164mm tall. Two 120mm fans come pre-installed to establish baseline airflow, and the case supports up to eight fan positions — including two 140mm mounts — so builders can scale cooling to match their hardware demands.

Storage is a particular strength of this chassis, with support for up to eight HDD or SSD drives, two of which use tool-less bays for quick swaps. A removable dust filter beneath the power supply compartment helps keep internals clean over time without requiring disassembly. The front I/O panel includes one USB 3.0 port (via internal header), two USB 2.0 ports, and audio jacks with support for both AC97 and HD Audio standards. While the NSE 300 lacks a side window and has a relatively utilitarian exterior, it delivers where it counts for builders focused on thermals, storage capacity, and straightforward assembly.