This article covers Cooler Master MasterBox CM694 ミドルタワー PCケース.

Overview

The Cooler Master MasterBox CM694 is a mid-tower PC case that emphasizes practical expandability over flashy aesthetics. With a steel-and-mesh construction, it supports motherboards from Mini ITX up to E-ATX, graphics cards up to 410mm, and CPU coolers up to 171mm in height. It also retains two 5.25-inch drive bays, making it one of the few modern mid-towers that can accommodate an optical drive. Front I/O includes USB 3.0 Type-A ports and a USB 3.1 Gen2 Type-C port, covering most current devices. Internally, the case offers six combo 3.5/2.5-inch drive bays plus two dedicated 2.5-inch brackets, allowing up to eight SSDs/HDDs in total. Cooling is well supported with room for three 120mm or two 140mm fans in the front, the same on top, and a single 120mm rear exhaust. Positioned as a mid-range workhorse, the CM694 is ideal for builds that require substantial storage, large graphics cards, or legacy optical drives. It forgoes tempered glass and RGB in favor of a clean, quiet, and highly configurable interior.

Compatibility Guide

The case accepts Mini ITX, Micro ATX, ATX, and E-ATX motherboards. When using E-ATX, routing cables may be a bit tighter, but it fits. Maximum GPU length is 410mm, and CPU cooler clearance is 171mm, so even the largest air coolers and flagship GPUs like the RTX 4090 can be installed. The PSU is mounted at the bottom, supporting standard ATX power supplies. Fan mounting options: front (no ODD) up to 3x120mm or 2x140mm, or with ODD 2x120mm/2x140mm; top 3x120mm or 2x140mm; rear 1x120mm. Radiator support includes 360mm front and 280mm top, allowing custom water loops. Storage bays: two 5.25-inch optical drives, six 3.5/2.5-inch combo bays (each can take either size), and two dedicated 2.5-inch SSD brackets. This gives ample room for a high-capacity file server or workstation build.

Product Info

Released around 2019, the Cooler Master MasterBox CM694 is still widely available through retailers like Japan. The typical price is approximately ¥19,267 (as of June 2026). Cooler Master offers a standard 2-year warranty. It sits in the entry-to-mid range in terms of price, but the expansion capabilities rival more expensive enclosures.

Best Use Cases

  • Users who need an optical drive: With two 5.25-inch bays, you can install a Blu-ray burner or a fan controller. This is rare among modern mid-tower cases. - Storage-heavy builds: Support for up to eight drives makes the CM694 a strong candidate for a home NAS, video editing rig, or server backup station. - High-end gaming/creative PCs: The generous GPU and cooler clearance let you combine a top-tier air cooler with a flagship graphics card without clearance issues. The case also accommodates large radiators for water cooling.

Things to Consider

The mesh front panel can let dust in, so regular cleaning of the included filters is recommended. The standard model comes with a solid steel side panel (no window), which may disappoint users who want to show off their build. A tempered glass version (CM694 TG) exists, so check your purchase option. The front USB-C port runs at 10Gbps (USB 3.1 Gen2), not the newer 20Gbps or Thunderbolt 4. If you need the latest I/O or a more modern design with integrated RGB, cases like the Cooler Master MasterBox TD500 or Fractal Define 7 might be better choices. Also, the case is somewhat heavy (around 10 kg), so repositioning it frequently is not convenient. Overall, it is a no-frills, functional chassis that excels at storage and cooling, but it may feel dated to those seeking cutting-edge connectivity or aesthetics.

Product Disclosure (Amazon)

  • Manufacturer: Cooler Master
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B07T75218K
  • Note: This article covers a manufacturer-made product based on Amazon listing details.