This article covers MSI MPG GUNGNIR 300R エアフロー.

Overview

The MSI MPG GUNGNIR 300R AIRFLOW is a premium mid-tower case designed for maximum airflow. It features a full-length mesh front and top panel, and comes pre-installed with four 120mm PWM ARGB fans plus a six-port fan hub. The chassis measures 505 x 235 x 510mm and supports E-ATX motherboards, making it a versatile choice for high-performance builds. A 4mm tempered glass side panel is slightly offset to improve airflow, and the case includes a built-in Mystic Light ARGB controller for seamless lighting integration with MSI components. The I/O panel offers USB 3.2 Gen 2x2 Type-C (20Gbps), two USB 3.2 Gen 1 Type-A ports, and a dedicated LED switch for manual lighting control.

Compatibility Guide

The GUNGNIR 300R AIRFLOW supports E-ATX, ATX, micro-ATX, and mini-ITX motherboards. Maximum GPU length is 360mm, and CPU cooler height is 175mm. The power supply mounts at the bottom and can accommodate units up to 220mm long. A slide-out 3.5-inch HDD cage is included, and the PSU bay has top, side, and bottom air inlets. Radiator support: up to 360mm at the front and top (three fans each), and 120mm at the rear. An internal bracket can hold up to three additional fans. Dust filters are installed on the front, top, side, and bottom.

Product Info

Released in late 2023, the MPG GUNGNIR 300R AIRFLOW sits in the mid-to-high tier of mid-tower cases, with a typical street price between ¥25,000 and ¥30,000. It comes with a one-year manufacturer warranty and is widely available through major retailers and online stores. Its market position is defined by excellent out-of-the-box cooling: four ARGB fans and a hub are included, which is rare at this price point. For users building an MSI-centric system, the Mystic Light integration is a strong selling point.

Best Use Cases

This case is ideal for gamers building a high-end rig with a large GPU and a beefy CPU cooler. The 360mm radiator support and 175mm cooler clearance allow for top-tier air or liquid cooling solutions, even with flagship CPUs like the Core i9 or Ryzen 9. It's also a great choice for builders who want a cohesive ARGB lighting setup without extra purchases. The four pre-installed fans and controller provide a unified look out of the box. Finally, users who prioritize airflow over silence will appreciate the mesh panels and the generous fan configuration. The case performs well under sustained heavy loads. ## Alternatives
Direct competitors include the Fractal Design Pop Air and Corsair 4000D Airflow. The Pop Air is quieter and has a cleaner aesthetic but only includes two fans. The 4000D Airflow offers excellent airflow and cable management but lacks ARGB fans. The GUNGNIR 300R AIRFLOW wins on value with its four ARGB fans and hub, but its interior can feel cramped when using E-ATX boards, and cable routing requires careful planning.

Things to Consider

This case prioritizes airflow, so sound dampening materials are minimal. If you need a quiet PC, look elsewhere. Also, the included fans are 120mm; if you prefer 140mm fans, check bracket compatibility before purchasing. When using an E-ATX motherboard, cable management space becomes tight. Thick cables may prevent the side panel from closing properly, so measure your motherboard's width beforehand. While the price is mid-range, the included accessories make it a strong value for first-time builders. However, if your budget is tight, consider a cheaper case with fewer fans and add them later.

Product Disclosure (Amazon)

  • Manufacturer: MSI
  • Seller: World Discovery Store
  • Fulfilled by: World Discovery Store
  • ASIN: B0CJ5YM9N3
  • Note: This article covers a manufacturer-made product based on Amazon listing details.