Fractal Design Define One Light Solid ATX PC Case with Sound-Damped Steel Panels and Three Momentum 14 Fans (FD-C-DEFOA-04)

A Refined Light Solid-Panel Enclosure for a Considered Desktop Build

Fractal Design Define One Light Solid pairs a restrained closed-front design with sound-damped steel side panels and three included Momentum 14 front fans. It is for builders who prefer the solid-panel white presentation rather than a glass-side showcase, with their compatible desktop components selected separately.

Aluminum side intake vents, an integrated GPU air guide, cable management and reverse-connector ATX/Micro-ATX support provide useful installation choices. Plan the exact motherboard, radiator/fan assembly, GPU and cable arrangement together before purchase. Sound-dampening materials are not a promise of silent operation; temperatures and noise still depend on installed hardware, fan settings and the room.

Best For: Light solid-panel setups, Understated gaming PCs, Creative workstations, Reverse-connector layouts, Planned liquid cooling, Tidy cable management

DETAIL SPECIFICATION

TECHNICAL FEATURES

Choose the Solid panel configuration deliberately

Both side panels use sound-damped steel on this exact Light Solid model. It is not a tempered-glass variant, and the hardware inside is not presented as a complete PC bundle.

Airflow and sound dampening need a balanced plan

The closed-front design uses side intake vents and three Momentum 14 fans. Choose cooling hardware and fan settings for the actual heat load rather than assuming sound-dampening materials eliminate all noise.

Modern board and cable-layout options

The case supports reverse-connector ATX and Micro-ATX layouts. Verify the exact board and required cable bends, and use the routing grommet and straps to keep service access practical.

Check maximum dimensions as a complete assembly

The nominal GPU, CPU cooler and PSU limits do not ensure every radiator, fan, drive and cable combination fits together. Measure the actual selected components and mounting locations before assembly.

🔎 Technical Conclusion

Case Format:
Define One Light Solid enclosure with sound-damped steel side panels, not the TG variant.

Airflow / Cooling:
Three Momentum 14 front fans; front radiator sizes up to 360mm and top up to 280mm with a full fit check.

Component Clearance:
GPU up to 368mm, CPU cooler up to 171mm and ATX PSU up to 180mm; verify cooling, drives and cables together.

Connectivity / Layout:
Two USB-A 5Gbps, USB-C 20Gbps, combo audio and support for reverse-connector ATX/Micro-ATX boards.

Physical / Installation:
482 x 235 x 500mm; 11.3kg net; seven expansion slots and 37mm cable-routing space.

Overall Positioning:
A restrained white solid-panel enclosure for a separately specified desktop balancing practical airflow, acoustic treatment and tidy installation.

✅ Suitable For

• Builders preferring a light solid-panel desktop
  Choose this exact steel-side configuration rather than expecting a glass window or another Define model.
• Users considering a sound-damped enclosure
  Match the actual CPU/GPU heat load, cooler and fan settings to the room; the case alone does not guarantee silence.
• Builders using reverse-connector ATX or Micro-ATX boards
  Compare the exact board cut-outs, header placement and cable bends before installation.
• Owners planning liquid cooling and tidy servicing
  Measure complete radiator/fan assemblies and keep cables, filters and removable panels accessible.

🛡️ Buy With Confidence — Ralik Aftersales Support

• Build-Fit Guidance
  Contact Ralik with exact motherboard, graphics card, cooler and PSU models for compatibility guidance.
• Aftersales Assistance
  Contact Ralik for product-related aftersales assistance.