Fractal Design Define One Dark Solid Mid Tower Case

The Fractal Design Define One Dark Solid is a mid tower PC case that combines understated Scandinavian styling with sound-dampening construction and versatile hardware support. Its closed steel front and sound dampened side panels help reduce system noise, while finely patterned aluminium side intake vents and three pre-installed 140mm Momentum fans provide airflow for your components. Supporting Mini-ITX, Micro-ATX, ATX and E-ATX motherboards, the Define One accommodates graphics cards up to 368mm long and CPU coolers up to 171mm tall, with radiator mounting options at the front, top and rear for flexible cooling configurations. Tool-less panel access and removable front and top fan brackets simplify installation, while integrated cable-routing features, hook-and-loop straps and 37mm of cable management space help keep builds organised. The front I/O includes a 20Gbps USB-C port, two 5Gbps USB-A ports and a combined headphone and microphone jack, providing convenient connectivity for everyday use. Finished in black with solid panels, the Define One Dark Solid case is well suited to clean, quiet-focused gaming and productivity builds.

Features

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Cases - Define One

Define One combines refined Scandinavian design with versatile capability. With aluminium side intake vents, three pre-installed Momentum fans, and sound-dampening bitumen, it balances airflow and noise reduction for a harmonious experience.

Quiet Redefined

Quieter by Design

Enjoy a more harmonious gaming experience with a closed-front design and bitumen-lined front and side panels for sound dampening.

Refined Expression

Integrate your setup naturally into your home with subtle architectural curvature and fine-patterned aluminium side intake vents.

Smooth Building

Enjoy a smooth and intuitive build experience with tool-less access and removable top and front fan brackets for easier installation.

Powerful Fans Included

Keep your system running smoothly with three pre-installed LCP-blade Momentum 14 fans offering powerful out-of-the-box airflow.

Designed for Versatility

Crafted for work and play with space for graphics cards up to 368 mm in length with an integrated GPU air guide and support bracket.

Accessible I/O

Connect your devices effortlessly with an I/O featuring a 20 Gbps USB Type-C port, two USB Type-A ports, and a combined audio jack.

Clean Finish

Achieve a neat and tidy interior with cable straps, aligners, a routing grommet, and support for reverse connector motherboards.