Fractal Design Define S


Fractal Define S

Fractal Define S


The Fractal Design Define S lends the appearance, sound dampening technology, and support for a wide variety of components from the widely popular Define Series, while introducing a new, innovative internal layout. 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, presented in a stunning Scandinavian inspired construction.

The modernized internal layout of the Define S omits the optical drive bays, instead 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.


Fractal Define S


Key Features

  • ·         Optimally designed for silent computing, while not compromising on airflow and cooling capabilities
  • ·         Innovative internal layout, providing a perfectly straight airflow path to the CPU heatsink for air cooling set ups or extensive radiator mounting possibilities for water cooling set ups
  • ·         Extensive water cooling support for a case of this size; housing radiators up to 420mm in the top and 360mm in the front
  • ·         Including smart reservoir brackets; featuring drill-free reservoir mounting on the front of the motherboard tray and pre-drilled pump mounting holes on the bottom panel
  • ·         Equipped with ModuVent™ fan slot covers providing the option of additional cooling or maximum sound absorption
  • ·         Including two Fractal Design Dynamic GP14 140mm fans developed for superlative airflow while still maintaining low noise levels
  • ·         Maintaining a dust-free interior with dust filters that cover the front and bottom air intakes
  • ·         Introducing newly designed hard drive trays placed vertically behind the front partition of the motherboard tray; Three sturdy steel trays with vibration-dampening grommets allowing for installation of one 3.5" or 2.5" drive on each tray, without disrupting the airflow or interfering with the radiator mounting possibilities
  • ·         An additional 2 dedicated steel SSD trays cleanly placed behind the motherboard tray
  • ·         Long motherboard tray extending to the front panel contributing to an extremely clean build, hiding both hard drives and cables
  • ·         Define S model is also available with a large window on the side panel


For more product details and image gallery, visit the Define S product page!


Fractal Define S  


MSRP Define S

MSRP Define S Window

USD     $79.99

USD     $89.99

EURO   €89.99

EURO   €99.99

GBP     £64.99

GBP     £69.99




  • - ATX, Micro ATX, Mini ITX motherboard compatibility
  • - 7 expansion slots
  • - 3 - 3.5" HDD positions (can also accommodate 2.5" units); 2 - 2.5" 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 so no thumbscrews are lost
  • - Colours available: Black
  • - Case dimensions (WxHxD): 233 x 451 x 520mm
  • - Case dimensions - with feet/screws/protrusions: 233 x 465 x 533mm
  • - Net weight - window version: 8.5 kg
  • - Package dimensions (WxHxD): 322 x 615 x 535mm
  • - Package weight - window version: 10.2 kg


Fractal Define S  

My Thoughts

Fractal cases are usually very popular here at OC3D, their clean designs and excellent acoustic performance has made it perfect for use by us silence freaks for years, being used in TTL's old home server and his new server build.

This case will not be suitable for uses as a server, as it can only make use of 3 3.5" HDDs and 2 2.5" mounting points. This will be enough for most people however and it has the added advantage of hiding them behind the motherboard tray, making this case particularly tidy.


Fractal Define S  

This case is intended for water cooling, but without sacrificing on the amount of storage the user can have. In this case you can have a 420mm radiator on the top and a 360mm radiator in the front while still being able to have a total of 3 3.5" hard drives and 2 2.5" drives, which is more than enough for the needs of the majority of users.

TTL has a sample of this case for review, so expect to hear our opinions on this case soon.


You can join the discussion on the Fractal Design Define S on the OC3D Forums.  

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Most Recent Comments

20-04-2015, 09:49:05

Originally Posted by Watsyerproblem View Post
Meet the Fractal Design S, a case with extensive watercooling compatibility and a modernized layout with no optical drive bays.
Nice to see another case company sticking their necks out and releasing a case with no optical drive bays.

Kinda wish corsair would do the same with their next Obsidian line casesQuote

20-04-2015, 09:53:22

My sample of this arrived today (its late) so the review will be live asap (wednesday maybe)Quote

20-04-2015, 10:23:29

Originally Posted by King of Old School View Post
Nice to see another case company sticking their necks out and releasing a case with no optical drive bays.

Kinda wish corsair would do the same with their next Obsidian line cases
Amen to that! I haven't fitted one in my last 3 systems, it's just as easy to pop the side panel, plug in use and disconnect, or use an external.Quote

20-04-2015, 11:41:15

Waiting on your review, but from the looks of it I just found my future case...Quote

20-04-2015, 13:29:14

Why is it more expensive in euros than in dollars? The euro is still worth more than the dollar.Quote

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