Fractal Design Define One Dark Solid Midi Tower Black Case with Sound Dampening 3x 120mm Fans USB Type-C ATX Micro ATX

SKU: FD-C-DEFOA-01

Original price was: £152.39.Current price is: £142.34.

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About This Item

  • Compatible motherboard form factors including ATX EATX micro ATX and Mini-ITX
  • Three pre-installed 120mm Momentum fans for powerful airflow
  • Midi Tower form factor with steel construction and black colour
  • Supports graphics cards up to 36.8 cm in length
  • Front I/O includes one 20 Gbps USB Type-C port and two USB Type-A ports
  • Sound dampening bitumen-lined front and side panels for reduced noise
  • Tool-less access and removable fan brackets for smooth building
Description

Fractal Design Define One – Quiet Midi Tower with Pre-installed Fans

We welcome the Fractal Design Define One Dark Solid Midi Tower Black Case with Sound Dampening 3x 120mm Fans USB Type-C ATX Micro ATX to our range. This case suits builders seeking silence without sacrificing airflow. Its sound-dampening bitumen reduces noise effectively. You get a harmonious system experience right away.

Fractal Design Define One Dark Solid Midi Tower Black Case with Sound Dampening 3x 120mm Fans USB Type-C ATX Micro ATX Overview

This model merges refined Scandinavian aesthetics with robust internal capability. We appreciate how it balances acoustic comfort with strong thermal performance. The aluminium side vents maintain airflow while looking elegant. You can build high-end components without compromising style.

Key measurements and limits

Metric Spec.
Maximum GPU length 36.8 cm
Maximum CPU cooler height 17.1 cm
Supported motherboard forms ATX to Mini-ITX
Maximum PSU length 18 cm
Net weight 11.2 kg

Achieving a quieter system

You benefit from bitumen-lined front and side panels. These materials dampen vibrations and noise significantly. The closed-front design helps keep sound inside. Your room remains peaceful during gaming or work.

Managing airflow and cooling

Three pre-installed Momentum fans arrive ready to use. They provide strong airflow straight out of the box. You can fit large radiators at the front. This flexibility supports demanding custom loop configurations easily.

Simplifying the build process

Tool-less access makes panel removal straightforward. The removable fan brackets aid cable routing. You will find plenty of space behind the tray. Straps and aligners keep your internal layout tidy.

Modern connectivity options

An integrated USB Type-C port offers 20 Gbps speeds. Two standard USB-A ports sit alongside it. Audio jacks allow easy connection for headsets. External storage devices connect without delay.

Included items

We ensure you receive a manual for reference. All necessary screws come inside the package. You have everything needed to start assembling.

Compatibility checks

  • Confirm your motherboard form factor matches the tray.
  • Verify your graphics card does not exceed 36.8 cm.
  • Check that your PSU fits the 18 cm limit.

Frequently Asked Questions

Frequently Asked Questions

Q: Does this case support EATX motherboards?

A: Yes, it supports ATX, EATX, micro ATX, and Mini-ITX.

Q: Are the front fans installed?

A: Yes, three 120mm Momentum fans come pre-installed.

Q: What is the USB Type-C speed?

A: The Type-C port supports speeds up to 20 Gbps.

Q: Does it have sound dampening?

A: Yes, bitumen lining on panels reduces noise.

Our final assessment

We recommend this tower for builders valuing quiet performance. It fits the Fractal Design Define One Dark Solid Midi Tower Black Case with Sound Dampening 3x 120mm Fans USB Type-C ATX Micro ATX description perfectly. You gain a clean build experience with proven acoustic treatment. It remains a solid choice for modern desktops.

Specifications
Technical details
Number of 3.5" bays2
Number of 2.5" bays4
Number of internal 3.5" bays2
Supported motherboard form factorsATX, EATX, micro ATX, Mini-ITX
Supported HDD sizes2.5,3.5"
Number of HDDs supported2
Product colourBlack
Number of expansion slots7
Maximum CPU cooler height17.1 cm
Maximum graphics card length36.8 cm
Maximum PSU length18 cm
TypePC
Form factorMidi Tower
Material
MaterialSteel
Ergonomics
Cable managementYes
On/off buttonYes
Design
Anti-dust filterYes
MaterialSteel
Number of 3.5" bays2
Number of 2.5" bays4
Number of internal 3.5" bays2
Supported motherboard form factorsATX, EATX, micro ATX, Mini-ITX
Cable managementYes
Product colourBlack
Number of expansion slots7
Maximum CPU cooler height17.1 cm
Maximum graphics card length36.8 cm
Maximum PSU length18 cm
TypePC
Form factorMidi Tower
On/off buttonYes
Number of storage drives supported4
Full-Height expansion slots7
Power supply
Supported power supply form factorsATX
Power supply includedNo
Ports & interfaces
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Combo headphone/mic portYes
USB Type-C ports quantity1
Cooling
Front radiator sizes supported120,240,280,360 mm
Rear radiator sizes supported120 mm
Top radiator sizes supported120,240,280 mm
Front fans installed3x 120 mm
Number of front fans supported (max)3
Front fans diameters supported120,140 mm
Number of rear fans supported (max)1
Rear fans diameters supported120 mm
Number of top fans supported (max)2
Top fans diameters supported120,140 mm
Storage
HDD/SSD combo cageYes
Supported HDD sizes2.5,3.5"
Number of HDDs supported2
SSD form factor2.5"
Packaging content
ManualYes
Screws includedYes
Weight & dimensions
Width235 mm
Depth482 mm
Height500 mm
Weight11.2 kg
Packaging data
Package width355 mm
Package height600 mm
Package depth600 mm
Package weight13.1 kg
ManualYes
Other features
ManualYes
Screws includedYes
Identifiers
Additional EANs0843276113384

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