

Cooler Master MasterBox NR400 with ODD
Form & Function Streamlined
A minimalistically-designed, compact case engineered for micro-ATX and mini ITX platforms. The meshed front panel pairs with a pre-installed front intake fan and rear outtake fan to create efficient airflow. A tempered glass side panel lets you admire and showcase your neat, clean build, which is achieved by cable routing space behind motherboard tray and a power supply shroud hiding cables and drives. Although with compact dimensions, the inside of the chassis is smartly arranged to accommodate high-performance components, while also offering flexibility to configure air or water cooling as needed. For easy access, two USB ports, a reset button, a Cooler Master logo-shaped power button, and a 4-pole headset jack are located on the top of the case.
Minimalistic Design
The MasterBox NR400 is a pure and simple design that is focused on airflow performance. A single-layer, fine mesh makes up the entire front panel, achieving efficient airflow while also acting as a dust filter.

Seamless Tempered Glass
The tempered glass side panel sits completely flush against the chassis, mounted securely and discreetly by a system of tabs and thumbscrews.

Ample Storage Support
A total of 4x 2.5" and 3x 3.5" drives can be mounted using a tool-less system. Storage can be mounted on the PSU shroud, behind the motherboard tray, and within the versatile HDD cage.
* An extra 3.5" drive can be mounted only on the ODD version (pictured).

Versatile HDD Cage
The HDD cage is (re)movable. The cage can be shifted forward to make room for a longer PSU, backwards for additional radiator space, or completely removed if HDD storage is not needed.

Headset Jack
The single 4 pole headset jack features both Audio and Microphone capabilities simultaneously so that separate jacks are not needed.

Fan Support
- Front: 120mm x3 / 140mm x2
- Top: 120mm x2 / 140mm x2
- Rear: 120mm x1
- * non ODD version

Radiator Support
- Front: 120/140/240/280mm
- Top: 120/240mm
- Rear: 120mm
- * non ODD version


Pros: This is one of those cases you will find yourself tinkering with until you've found your sweet spot for satisfaction. I placed three different builds into this case since I purchased it, and the last build will be the one I keep configured. I found myself dismantling the entire case and every included component to the bare frame. I've tinkered with the cable management, IO panel, hardware mounts, insulation, cages, and etcetera, multiple times. I figured out what works best with this chassis. I've never had an mATX/ITX designated case consist of so many options to choose from, especially for the low price point. Its construction should not fool anyone. The pictures posted online do not serve it justice. It's lightweight, and NOT flimsy compared to other cases of similarity. The airflow potential in this case is remarkable. 3 pre-mounted case fans are included with the purchase, and can easily be removed and/or upgraded accordingly. Thank you Cooler Master. This case is dead silent if you use a water cooling solution without case fans and moving components. All of the set screws and grommets are included as well.
Cons: Cable management and disassembly are the largest concerns for this case. Once you've disassembled the entire chassis, reassembly and build configuration become easier. The reason cable management is a concern is if you A) do not use a modular power supply, and B) install more components than needed to run a simple desktop PC. Tucking the cables behind the motherboard tray can be tedious. I suggest you invest in using the zip-ties and finding notches to strap the cables to. Stacking cables may not allow the panel doors to close properly. They are prone to bending and bulging. Please be careful.
Overall Review: For clarification purposes, the chassis supports the following drive configurations. 1x 5.25in Drive mounted in the optical bay. (External) 1x 3.5in Drive mounted under the optical bay. (External) 2x 3.5in Drives mounted on the bottom of the chassis (Internal) This cage can also shift positions in the chassis. 2x 2.5in Drives (One under the modular bay, One above the 3.5in cage) (Internal) 2x 2.5in Drives (Mounted on the motherboard tray, using the included rubber grommets) (Internal) Users can swap out the 2x 3.5in drives for 4x 2.5in drives by using adaptors to mount in the cages. For users looking to invest in water cooling solutions for this case, I strongly advise you stick to single radiator solutions rather than the maximum permitted 240mm solutions available on the market. I attempted to front-mount install the h100 from Corsair and realized that the tubing restricted both the cable management options available with this case and the internal component mounts. For anyone that's curious, this is the build I installed in the N200. Case: Cooler Master N200 CPU: AMD Phenom II X6 1100T Black Edition Cooler: Corsair H50 Watercoolor Using 2 ~5v @1000±RPM Fans for Push-Pull Exhaust Motherboard: MSI 880GMA-E45 (MATX/AM3) Memory: GSkill RipJaws 4x4GB DDR3 1600mhz CAS 9 PSU: Corsair Enthusiast 650W NonModular GPU: Onboard AMD Radeon Graphics Optical Drive: LG BluRay Combo Burner Storage: 1x Samsung 850 Pro 2.5in 256GB Storage: 1x Samsung/Seagate 2.5in 1TB 5400RPM Storage: 2x WD Green EARS/EARX 3.5in 2TB 5400RPM