This article covers Cooler Master MasterBox NR200 ブラック Mini-ITX.

Overview

The Cooler Master MasterBox NR200 packs serious cooling and high-end GPU support into a compact 18-liter Mini-ITX chassis. Its all-steel black frame offers a clean, unobtrusive look that blends into any desk setup. Supporting up to 330mm triple-slot graphics cards and 155mm tall CPU coolers, this case can accommodate a 280mm top radiator as well. It's designed for enthusiasts who want maximum performance in a minimal footprint. Power supply mounting is limited to SFX (front-mount), and the package includes a 120mm top fan and a 92mm rear fan to get you started. The fully tool-less panel removal and skeletal frame make assembly and maintenance unusually easy for such a compact case. There's also a slot for a vertical GPU mount using an optional PCIe riser cable.

Compatibility Guide

Motherboard: Mini-ITX and Mini-DTX only. ATX or Micro-ATX boards will not fit. PSU: SFX or SFX-L form factor required. Standard ATX PSUs cannot be installed due to space constraints. GPU: Max length 330mm, max thickness 60mm (3 slots). Installing front fans or radiators may reduce available GPU clearance, so measure carefully if adding extras. CPU cooler: Max height 155mm. Top-flow coolers are ideal; large dual-tower air coolers may exceed the limit. Storage: One 3.5-inch bay, one shared 2.5/3.5-inch bay, and two dedicated 2.5-inch mounts. Up to four drives total, but GPU length and radiator thickness may block some bays. Water cooling: Top 280mm radiator support is standard. Thicker radiators or push-pull fan configurations may interfere with motherboard VRM heatsinks or RAM.

Product Info

The MasterBox NR200 launched in 2020 and quickly became a go-to choice for Mini-ITX builders. It occupies the mid-to-high end of the small-form-factor market, praised for balancing compact dimensions with excellent cooling and expansion. Cooler Master backs it with a 2-year warranty. Pricing typically falls between $70 and $100, making it competitive with other premium SFF cases.

Best Use Cases

High-performance gaming in a small box: Pair with a Mini-ITX board and an SFX PSU, and you can house a flagship CPU and top-tier GPU without thermal throttling. Water or air cooling, both work well. Space-conscious desk setups: With a footprint of just 185×292mm, it fits next to a monitor without dominating your desk. Vertical GPU mounting further tidies the look. * Enthusiasts who tinker often: Tool-less panel removal and full disassembly make rewiring or swapping parts a breeze. Beginners might find the tight interior challenging, but experienced builders will appreciate the build quality and flexibility. Not ideal for those wanting to reuse an ATX PSU or a large tower cooler, or for builds requiring three or more 3.5-inch HDDs.

Things to Consider

SFX PSU is mandatory: You cannot reuse an existing ATX power supply. SFX units often cost more per watt, so factor that into your budget. Cable management takes effort: Limited space means you'll need to route cables carefully. A fully modular SFX PSU is strongly recommended. Top radiator clearance: A thick 280mm radiator may contact VRM heatsinks or M.2 SSDs on certain Mini-ITX boards. Check specific build reports before purchasing. Vertical GPU mount sold separately: The case has the slot but does not include the riser cable. ## FAQ
Q: Can I use an ATX power supply in this case? A: No. The design supports only SFX and SFX-L. An ATX PSU will not fit without modifications and will likely prevent the side panel from closing. Q: Will a 240mm AIO cooler fit in the top? A: Yes, 240mm radiators install easily. They offer more clearance than 280mm, reducing potential interference. Q: Can I use a 3.5-inch HDD alongside a long graphics card? A: Yes, as long as the GPU length stays under about 330mm. Longer cards may block the front 3.5-inch bay. Check dimensions before building.

Product Disclosure (Amazon)

  • Manufacturer: Cooler Master
  • Seller: みつやストア
  • Fulfilled by: みつやストア
  • ASIN: B08CZNBKMP
  • Note: This article covers a manufacturer-made product based on Amazon listing details.