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Fractal Design Expands Define Series of Cases

The new Define S offers the same appearance, sound dampening technology, and support for a variety of components as other cases in the Define Series, while introducing a new internal layout. By ChannelPro

Fractal Design, a manufacturer of computer cases, power supplies, and fans based in Sweden, has released the Define S case, a new segment of the company’s Define series of cases. The Define S features the same appearance, sound dampening technology, and support for a wide variety of components as other cases in the Define Series, but with a new internal layout. The internal layout of the Define S omits the optical drive bays, instead focuses on a clear straight airflow path and uncompromising water cooling support.

Key features of the Define S include:

  • Straight airflow path to the CPU heatsink for air cooling set ups or extensive radiator mounting possibilities for water cooling set up
  • Houses radiators up to 420mm in the top and 360mm in the front
  • Drill-free reservoir mounting on the front of the motherboard tray and pre-drilled pump mounting holes on the bottom panel
  • ModuVent fan slot covers providing the option of additional cooling or maximum sound absorption
  • Two Fractal Design Dynamic GP14 140mm fans
  • Dust filters that cover the front and bottom air intakes
  • Newly designed hard drive trays placed vertically behind the front partition of the motherboard tray
  • Three steel trays with vibration-dampening grommets allowing for installation of one 3.5-inch or 2.5-inch drive on each tray
  • Additional 2 dedicated steel SSD trays placed behind the motherboard tray
  • Long motherboard tray extending to the front panel, hiding both hard drives and cables
  • Available with a large window on the side panel


  • ATX, Micro ATX, Mini ITX motherboard compatibility
  • 7 expansion slots
  • 3 - 3.5-inch HDD positions (can also accommodate 2.5-inch units); 2 - 2.5-inch dedicated SSD/HDD unit positions
  • 9 - Fan positions (2 Fractal Design Dynamic GP14 140mm fans included); 8 fan positions on window model
  • Filtered fan slots in the front and bottom
  • CPU coolers up to 180mm in height
  • ATX PSUs up to 180/170 mm with a bottom 120/140mm fan installed; When not using any bottom fan location longer PSUs up to 300mm can be used
  • Graphics cards up to 425 mm in length with front fans installed, without compromising HDD capacity; Graphics cards up to 450mm in length without front fans installed directly in line with the GPU
  • With a front radiator, maximum graphics card length is reduced by the radiator thickness
  • 20 - 40 mm of space for cable routing behind the motherboard plate
  • Velcro straps included for easy cable management
  • Both side panels feature smart captive thumbscrews
  • Case dimensions (WxHxD): 233 x 451 x 520mm

For more information, visit the Define S product page.

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