Fractal Design Define S Nano Mini ITX Case- Windowed

2 Years Limited Warranty


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An ITX case that features compatibility with high-end, full-size components, superior sound dampening and an ATX-like layout

  • User-friendly construction with superior cable management and compatibility for full-size components
  • Flexible storage options with room for up to four drives
  • Accommodates a variety of radiator sizes and includes brackets for reservoir and pump mounting
  • Features two Dynamic Series fans — 1 GP-12 and 1 GP-14 — with an adapter included for motherboards with limited fan headers
  • Featuring an open interior allowing an unobstructed airflow path from the front of the case to the rear exhaust
  • Easy-to-clean filters on the bottom and front, spanning the PSU position, with the bottom filter ejecting from the front for easy access.

Designed for silent computing

This case includes two Dynamic Series fans with both bottom and front intakes protected by easy-to-clean, removable dust filters. With its mounting capabilities for simultaneous radiators and unobstructed airflow path, the Define Nano S can cool enthusiast-level components.

Equipped with Fractal Design’s signature ModuVent™ technology on the top vents and sound dampening throughout, the Define Nano S can run a powerful system quietly – a hallmark of the Define series.

Full visiblity

Windowed side panel on the left side

ModuVent technology

Designed for silent computing with sound dampening and ModuVent™ technology

Water-cooling ready

Accommodates a variety of radiator sizes and includes brackets for reservoir and pump mounting


  • 3.5" HDD/2.5" SSD positions
  • 2.5" dedicated SSD unit positions
    2 (fits SSDs up to 13 mm thick)
  • Expansion slots
  • Front ports
    2x USB 3.0, Audio in/out, Power button with LED (blue), HDD activity LED (blue), Reset button
  • Total fan mounts
  • Front fan
    2x 120/140 mm (included is 1 Fractal Design Dynamic GP-14 fan @ 1000 RPM)
  • Top fan
    2x 120/140 mm
  • Rear fan
    1x 120 mm (included is 1 Fractal Design Dynamic GP-12 fan @ 1200 RPM)
  • Bottom fan
    1x 120 mm
  • Dust filters
    Front fans, Bottom fans (ejects from the front of the case)
  • Cable routing grommets
  • Fixed velcro straps
  • Captive thumbscrews
    Both side panels, rear HDD/SSD brackets
  • Left side panel
    Clear transparent window
  • Right side panel
    Industrial sound-dampened steel


  • Power supply type
  • Motherboard compatibility
  • Front radiator
    120/240 mm or 140/280 mm (max width 147 mm, max length 312 mm; some radiators extend beyond the screw holes)
  • Top radiator
    120/240 mm (max component height on motherboard 35 mm. Big heat sinks on RAM or power regulators around CPU could conflict with this restriction.)
  • Rear radiator
    120 mm (max width 125 mm; some radiators extend beyond the screw holes)
  • Bottom radiator
    120 mm (max thickness and length: 85 mm x 160 mm)
  • PSU max length
    160 mm
  • GPU max length
    315 mm with front fans mounted (cards wider than the dual slot bracket are not recommended)
  • CPU cooler max height
    160 mm
  • Cable routing space
    17-35 mm
  • Max recommended GPU thickness
    39 mm


  • Case dimensions (WxHxD)
    203 x 330 x 400 mm
  • Case dimensions - with feet/protrusions/screws
    203 x 344 x 412 mm
  • Net weight
    5.0 kg
  • Case volume
    26.80 litres
  • Package dimensions (WxHxD)
    275 x 485 x 420 mm
  • Package weight
    6.2 kg


  • Package contents
    Define Nano S computer case, User manual, Accessory box
  • EAN
  • UPC
  • Product code

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