Define Mini

The Define series is reaching new heights in combining stylish, contemporary design with maximum functionality and sound dampening features

  • Stunning front panel design
  • ModuVent™ design lets you choose optimal silence or optimal airflow
  • Pre-fitted with dense, sound dampening material

Less noise – more oomph

The minimalist yet stunning front panel design, fitted with sound dampening material on the inside, creates an aura of exclusivity. The Define Mini is the smaller sibling of the acclaimed and award winning Define R4 case. Being a micro ATX version of Define R4, it offers a number of interesting functions with a very stylish appearance.

The patent pending feature ModuVent™, in which you can choose whether to have fan slots in side and top panels open or not, makes the case appealing for users seeking optimal silence, as well as the performance hungry ones.

The sleek black interior is matched with pre-fitted, dense sound dampening material on the side panels, efficiently blocking noise and vibrations. You can fit an astonishing total of six hard drives into this case, using the user friendly HDD-trays.

Key features

  • Six white painted HDD-trays, with silicone mounting

  • A total of six fan slots (2x 120 mm in front, 1x 120/140 mm in top, 1x 120 mm in back, 1x 120/140 mm in side panel, 1x 120 mm in bottom)

  • Two 120 mm Fractal Design 120 mm fans included

  • Fan controller for three fans included

  • Upper HDD cage can be rotated and removed

  • Extra, vertically mounted expansion slot, suitable for fan controllers or non-input expansion cards

GPU support

Supports graphic cards up to 400 mm (without upper HDD bay)

USB 3.0

USB 3.0 support in the front panel

Smart cable routing

Excellent cable routing and cable routing covers

"For anyone looking to build a compact, low noise system the Fractal Design Define Mini should be at the top of the shopping list."
Hardwareheaven Read the full review
"The Mini is a great addition to the product range of Fractal Design, they already had the hugely popular Define R3 and also the huge Define XL for people who need even more space, so it's only logical to address also the mATX-users out there. All the good features that earned the R2 and XL good scores in our reviews are still there in this smaller edition, it's very quiet, looks stylish, comes with affordable price tag and also keeps the components cool enough."
"The Fractal Design Define Mini deserves the same score as the Define R3. The case is a successful attempt at offering the exact same features of the bigger cases as a compact mATX variant. On top of that the Define Mini finally is the first of the entire Define series to ship with internal USB 3.0. Besides that, it is commendable that Fractal Design has managed to keep the fan layout the same, include the six hard drive bays and virtually transport each feature of the Define R3 or XL in the Define Mini. On top of that, as it should be with a smaller chassis, this case naturally costs less. Thus it is just as good as all the other Define cases out there and perfect for those who want a silent enclosure but with the compact dimensions of a micro-ATX system. The only downer is the fact that the Define Mini is only available in black."


  • 3,5" HDD/SSD positions
  • ODD slots
  • Expansion slots
  • Front ports
    2x USB 2.0, 1x USB 3.0, Audio I/O
  • Total fan mounts
  • Front fan
    2x 120 mm (1x Fractal Design 120 mm @ 1200 RPM included)
  • Top fan
    1x 120/140 mm
  • Rear fan
    1x 120 mm (1x Fractal Design 120 mm @ 1200 RPM included)
  • Bottom fan
    1x 120 mm
  • Side fan
    1x 120/140 mm


  • Power supply type
  • Motherboard compatibility
    Mini ITX, Micro ATX
  • PSU max length
    170 mm, when using bottom 120/140 mm fan location (otherwise typically 200-220)
  • GPU max length
    260 mm (with HDD-bay) or 400 mm (without HDD-bay)
  • CPU cooler max height
    160 mm


  • Case size (WxHxD)
    210 x 395 x 490 mm
  • Net weight
    9.50 kg


  • Package contents
    Define Mini computer case, Accessory box, User manual
  • EAN
  • Product code
  • Additional information
    Also available for System Integrators