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Cooler Master CM690 IIICASE

CASECases·Cooler Master

Cooler Master CM690 III

4.2
Shed ScoreEditorial rating out of 5, based on specs, build quality and value in its class.
  • High airflow mesh design
  • Tool-free drive installation
  • Spacious cable management

The Cooler Master CM690 III delivers solid airflow performance and practical build features at a reasonable price point, making it a great choice for budget to mid-range PC builders who prioritize cooling over…

  • Form FactorATX Mid Tower
  • Motherboard SupportATX, Micro-ATX, Mini-ITX
  • Max GPU Length380 mm
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// Datasheet

Technical specifications

CM690-III5 fields
Form FactorATX Mid Tower
Motherboard SupportATX, Micro-ATX, Mini-ITX
Max GPU Length380 mm
Front I/OUSB 3.0 x2, Audio/Mic
Max CPU Cooler Height165 mm

// Verdict

Our take

4.2

The Cooler Master CM690 III delivers solid airflow performance and practical build features at a reasonable price point, making it a great choice for budget to mid-range PC builders who prioritize cooling over aesthetics. While it lacks some modern conveniences like tempered glass or RGB, its functional design and spacious interior make assembly straightforward and thermal performance reliable.

// Trade-offs

Pros and cons

+What we like

  • Excellent airflow thanks to mesh front
  • Spacious interior for cable management
  • Supports large CPU coolers and long GPUs
  • Tool-free design speeds up builds
  • Sturdy steel construction

−Watch out for

  • No pre-installed RGB lighting
  • Front mesh can collect dust quickly
  • Limited radiator support for high-end liquid cooling
  • Side panel is not tempered glass on base model

// Feature set

Key features

  • 01Full mesh front panel for high airflow
  • 02Tool-free drive bays for 2.5"/3.5" HDD/SSD
  • 03Supports up to ATX motherboards
  • 04Multiple fan mounts (front, top, rear) for custom airflow configs
  • 05Cable management channels behind motherboard tray
  • 06Pre-installed front intake fans

// Long read

Full review

The Cooler Master CM690 III carries forward the legacy of one of the most respected mid-tower case lines in PC building history, updating the classic CM690 formula with a design language suited for modern builders. The case retains the clean, functional aesthetic that made its predecessors popular among enthusiasts, while incorporating contemporary touches like mesh paneling for improved airflow and a more refined internal layout that caters to today's larger GPUs, thicker CPU coolers, and cable management demands. The steel and plastic construction feels sturdy without pushing into premium pricing territory, positioning it as a dependable workhorse chassis for builders who prioritize substance over flash.

Inside, the CM690 III offers generous clearance for high-end components, supporting ATX, Micro-ATX, and Mini-ITX motherboards with room to spare for multiple storage drives and a full-size power supply. The front panel ventilation and strategically placed fan mounts support multi-fan configurations, allowing builders to establish positive or negative pressure setups depending on their cooling philosophy. Cable routing channels behind the motherboard tray help keep the interior tidy, which not only improves airflow efficiency but also makes future upgrades or component swaps less of a hassle. The case accommodates both air and liquid cooling solutions, with radiator mounting points that give users flexibility as their cooling needs evolve over time.

Front I/O on the CM690 III typically includes USB ports and standard audio jacks, keeping daily connectivity straightforward without unnecessary complexity. The removable dust filters simplify maintenance, an often-overlooked feature that extends component longevity by reducing particulate buildup inside the chassis. Side panel options, including windowed variants in some configurations, let builders show off their internal hardware and RGB lighting choices if they've gone that route. Overall, the CM690 III appeals to builders who remember the original's reputation for reliability and want that same no-nonsense approach applied to a case that fits comfortably into modern gaming rigs, workstations, or general-purpose desktop builds without demanding a premium budget.

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