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Free Delivery On All PCs
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5 Star Trustpilot Rating
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Free UK Support
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30 Years Experience
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Award Winning Systems

Fractal Design Define S Windowed ATX Black Case


Re-Designed. The Define S case is packed with intelligently designed enthusiast-oriented features delivering a silent case with powerful and expansive air and liquid cooling support. The modernized layout omits the optical drive bays, focusing on a clear straight airflow path and uncompromising water cooling support. The Define S case reaches the highest level of silent computing through strategically placed dense sound-absorbing material, multiple ModuVent fan vent covers and finely tuned Dynamic Series fans.

Delivery Info
  • Components & Accessories: Normally delivered in in 3-5 working days - delivery cost: £4.99
  • Prebuilt PC's: Free delivery to mainland UK - normally delivered in 1-2 working days.
  • Custom PC's: Free delivery to mainland UK. Please see the 'turnaround' option on each page.

All orders are despatched by DPD on a Next Working Day service, and you will be advised of a one hour delivery window, which you can rearrange if required.

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  • Innovative Internal Layout -Providing a straight airflow path to the CPU heat sink for air cooling set ups or extensive radiator mounting possibilities for water cooling setups.
  • Extensive Water Cooling Support -Housing radiators up to 420 mm in the top and 360 mm in the front.
  • Smart Resevoir Brackets - Drill-free reservoir mounting on the front of the motherboard tray and pre-drilled pump mounting holes on the bottom panel.
  • ModuVent Technology - Equipped with ModuVent fan slot covers providing the option of additional cooling or maximum sound absorption.
  • Long Motherboard Tray - extending to the front panel contributing to an extremely clean build, hiding both hard drives and cables.


Form Factor Mid Tower
Motherboard Support ATX
Drive Bays 2x 2.5"
2x 2.5"/3.5" combo
Expansion Slots 7 horizontal
Max GPU Length 425mm (with front fans), 450mm (without front fans)
Max Cooler Height 180mm
Max PSU Length 180/170mm (with bottom 120/140mm fan), 300mm (without bottom fan)
Front Fan Mounts 3x 120mm
3x 140mm
Top Fan Mounts 3x 120mm
3x 140mm
Rear Fan Mounts 1x 120mm
1x 140mm
Bottom Fan Mounts 1x 120mm
1x 140mm
Pre-installed Fans 2x 140mm
Dimensions 233 x 451 x 520 (mm)
Front I/O 2x USB 3.0
1x 3.5mm Headphone
1x 3.5mm Microphone
More Information
Manufacturer Fractal Design
Manufacturer Part Number FD-CA-DEF-S-BK-W
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