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Fractal Design Define S - Black Mid Tower ATX PC Case with High Airflow, Silent Computing Features, 2x Dynamic GP-14 140mm Fans and Water-Cooling Ready
Fractal Design (7350041083443 / FD-CA-DEF-S-BK) - Audio input - Audio output - Cable management - LED indicators - Manual - Reset button - DEFINE S - Mid Tower - Black - Midi Tower - ATX MicroATX Mini-ITX | Water Cooling
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Fractal Design Define S: The Ultimate Mid‑Tower PC Case for High Airflow and Silent Computing
The Fractal Design Define S is engineered to deliver exceptional cooling performance while maintaining a whisper‑quiet environment. Its sleek black exterior, robust construction, and thoughtful layout make it an ideal foundation for both high‑end gaming rigs and professional workstations.
Key Features at a Glance
- Form Factor: Mid Tower (ATX, Micro‑ATX, Mini‑ITX)
- Dimensions: 233 mm × 451 mm × 520 mm (WxHxD)
- Weight: 9.1 kg
- Cooling Options: Up to 3 × 140 mm front fans, 1 × 140 mm rear fan, multiple top and bottom fan mounts; supports up to 180 mm CPU coolers.
- Drive Bays: 2 × 2.5″ + 3 × 3.5″ internal, plus 5 × 2.5″ hot‑swap bays.
- Expansion Slots: 7 full‑height slots for GPUs and other cards.
- Front I/O: 2 × USB 3.0, audio in/out, headphone out, power/reset buttons with LED indicators.
- Water‑Cooling Ready: Supports radiators up to 240 mm on the top and 360 mm on the bottom; includes mounting points for AIO units.
- Silent Design: Integrated sound‑deadening panels, rubberized fan mounts, and optional acoustic foam.
Premium Build Quality
The chassis is constructed from high‑strength steel with a matte black finish that resists fingerprints and scratches. The interior features a modular layout: removable side panels allow easy access to components while the front panel can be swapped for a tempered glass or acrylic view if desired.
Sound Dampening
Fractal Design has incorporated acoustic foam into the rear fan mount and along the top of the case. Combined with rubberized fan brackets, this design significantly reduces vibration noise, ensuring that even high‑RPM fans operate quietly.
Cooling Flexibility
The Define S offers a wide range of cooling configurations:
- Front Fans: Three 140 mm fan mounts (one pre‑installed) allow for high airflow intake. Users can choose between standard or low‑noise fans.
- Rear Fan: One 140 mm mount with a pre‑installed fan provides efficient exhaust.
- Top Fans: Three 120/140 mm mounts or one 180 mm mount for larger radiators. The case supports up to 240 mm radiators on the top, ideal for AIO liquid coolers.
- Bottom Fans: One 120/140 mm mount for additional airflow or a radiator mount for bottom‑mounted cooling solutions.
Water‑Cooling Compatibility
The case is pre‑wired with mounting points for top and bottom radiators, making it straightforward to install a 240 mm or 360 mm AIO unit. The internal layout keeps the radiator clear of cables, preserving airflow.
Storage Options
With five hot‑swap bays (three 3.5″ and two 2.5″), users can store multiple SSDs or HDDs without compromising space for other components. The remaining drive slots are secured with screws, ensuring stability during heavy use.
Drive Compatibility
- Maximum of three 3.5″ drives (approx. 8.9 cm each)
- Maximum of five 2.5″ drives (approx. 6.4 cm each)
Expansion and Connectivity
The Define S provides seven full‑height expansion slots, allowing for multiple GPUs or other PCIe cards. The front I/O panel includes:
- 2 × USB 3.0 ports for high‑speed data transfer.
- Audio in/out jacks and a headphone out for easy connectivity.
- Power button with LED indicator and system reset button, both illuminated for quick identification.
Cable Management
A dedicated cable management area behind the motherboard tray keeps cables organized. Velcro straps and tie‑down points help maintain a clean interior, which not only looks professional but also improves airflow by preventing cable clutter.
Power Supply Placement
The case supports standard ATX power supplies up to 170 mm in depth. The PSU is mounted at the bottom of the chassis, allowing for a lower center of gravity and easier cable routing.
Supported Power Supply Sizes
- ATX (standard)
- Mini‑ITX (if using a smaller PSU)
Dimensions and Weight Summary
| Dimension | Measurement |
|---|---|
| Width | 233 mm |
| Height | 451 mm |
| Depth | 520 mm |
| Weight | 9.1 kg |
Installation and User Experience
The Define S is designed for straightforward assembly:
- Pre‑drilled mounting holes align with most motherboard standoffs.
- Clear labeling of fan mounts and radiator brackets reduces confusion during build.
- Included manual provides step‑by‑step instructions, ensuring even novice builders can achieve a professional setup.
Conclusion: A Versatile Platform for Performance and Quietness
The Fractal Design Define S stands out as a mid‑tower case that balances high airflow, silent operation, and extensive customization. Its robust construction, comprehensive cooling options, and thoughtful cable management make it an excellent choice for anyone looking to build a powerful yet quiet PC.
| This product in Comparor | |
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Category
This product is cataloged in our store in these categories
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- Desktop computer cases |
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International
Find this product in one of our international stores
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 164.07 EUR   179.00 EUR  87.99 EUR  179.00 EUR |
| Colors
Predominant colors of the product |
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| Tags | Case Black case ATX case Computer case Tower case High airflow case Performance case Mid tower case Mid Case Black ATX Case 140mm fan case Mid tower computer case Black mid tower case High performance case Silent fan case Fractal design case ATX mid tower case Silent case Silent Computing Case Water Cooling Ready Case Dynamic fan case Gp-14 fan case Optimized Case Airflow optimized case Atx mid tower computer case Water Cooling Case Dynamic gp-14 fan case 140mm silent fan case Optimized performance case Fractal design define s case Define S Case S mid tower case S atx case Design define case Define s black case Define s high airflow case Define s water cooling ready case Dynamic GP-14 Case ATX Mid Case |
| Identifiers | |
| Brand | Fractal Design Fractal Design is a Swedish computer hardware company that produces cases, power supplies, and cooling products for computers. The company was founded in 2007 by Michael Nilsson and Peter Nilsson. |
| Model | Fractal Design FD-CA-DEF-S-BK |
| MPN | Fractal Design FD-CA-DEF-S-BK |
| ID | 1904184 |
| Dimensions / Weight | |
| Key Features | |
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Audio input Indicates whether the product includes a dedicated audio input port (e.g., 3.5 mm jack, RCA, optical). A value of "Yes" means an audio input is present; "No" means it is absent.
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Yes |
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Audio output The total count of physical audio connectors available on the product, such as headphone jacks, RCA outputs, or optical ports. The value is an integer indicating how many separate audio input or output points can be used to connect external devices.
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Yes |
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Cable management Indicates whether the product includes a built‑in system for organizing, routing, or securing cables. The value can be "Yes" when a cable management feature is present, "No" when it is absent, or a descriptive term such as "Cable Inlay System (CIS)" or "Cable Management System (CMS)" that specifies the type of integrated solution.
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Yes |
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Case Edition The edition or variant of a computer case, indicating a specific release such as "Standard", "Limited Edition", "Pro", or a numeric identifier. It distinguishes different versions of the same model and helps users identify the exact product they are viewing.
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DEFINE S |
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Case form factor The physical configuration or design of a computer case, such as ATX, Micro‑ATX, Mini‑ITX, Mid Tower, Full Tower, Rackmount, or other standardized form factors. It indicates the dimensions, mounting points and expansion options that determine compatibility with motherboards and components.
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Mid Tower |
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Colours A colour is a visual attribute that describes the hue or shade of an object or surface. It can be a single dominant colour, a combination of colours, or a range such as "Black, White". The value may be expressed in common names (e.g., Black, Silver) or descriptive terms (e.g., One Colour, Assorted).
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Black |
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Cooler height The vertical dimension of a cooling unit measured from its lowest to highest point. The value is expressed in a physical unit such as millimetres, centimetres or inches and applies to any cooler component where height is relevant, including air coolers, liquid radiators and passive heat sinks.
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180 mm |
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Depth The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.
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520 mm |
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Dimensions The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render the visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.
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233 x 451 x 520 (WxHxD mm) |
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Drive bays The total number of drive bays available in a computer case or enclosure, expressed as a combination of the quantity of each bay type and its physical size (e.g., "4 x 2.5" Internal 2 x 3.5" Internal"). This attribute helps users understand how many drives can be installed and what sizes are supported.
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2 x 2.5" Internal 3 x 2.5"/ 3.5" Internal |
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Fan Bays The total number and sizes of fan slots available in the product, expressed as a series of "count x size" pairs (e.g., 4 × 120 mm). This attribute indicates how many fans can be installed and what dimensions they must have.
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9 x 120/140mm |
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Fans Included The number and size of fans that come with the product. Each entry lists how many fans of a specific diameter are included, such as "2 x 120mm" or "1 x 140mm w/ RGB LEDs". This information helps users understand the cooling capacity and lighting options available out of the box.
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2 x 140mm |
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Form Factor Specifies the physical configuration or design of a product, such as ATX, Micro‑ATX, Mini‑ITX, tower, case with cover, etc. It describes how the device is built and what mounting or expansion options it supports.
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Midi Tower |
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GPU Length The linear dimension of a graphics card measured in a standard unit such as millimetres, centimetres or inches. It represents the overall length from one edge to the other and is used to determine whether the GPU will fit within a computer case or enclosure.
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425 mm |
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Height The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.
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451 mm |
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LED indicators A list of the functions or statuses that an LED indicator on a device can display, such as power status, activity, link, and other operational signals.
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Yes |
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LED Lighting Indicates whether the product incorporates LED lighting. A value of "Yes" means the device has one or more LEDs for illumination, while "No" indicates no LED components are present.
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No |
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Manual Indicates whether a user manual—physical or digital—is provided with the product. A value of "Yes" means that a manual is included, while a value of "No" indicates that no manual is supplied.
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Yes |
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Max 2.5" drives The total count of 2.5‑inch storage drives that a product can accommodate or support, whether as internal bays, expansion slots, or docking stations. The value is an integer representing how many separate 2.5‑inch drive units the system can host simultaneously.
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5 |
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Max 3.5" drives The total count of 3.5‑inch hard disk drives that a product can accommodate, whether as internal bays or external enclosures. The value is an integer representing how many separate 3.5‑inch drive units the system can host simultaneously.
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3 |
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Max GPU Card Length The maximum linear dimension of a graphics processing unit (GPU) that can be installed in a computer case, expressed with a standard length unit such as millimetres, centimetres or inches. It represents the longest side of the card and is used to determine whether a particular GPU will fit within a given chassis.
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450 mm |
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Maximum graphics card length The maximum linear dimension of a graphics card that can fit within the product’s enclosure, expressed in a standard length unit such as centimeters or inches. It indicates how large a GPU can be installed without exceeding the case or chassis limits.
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45 cm |
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Memory speed The maximum operating frequency of a memory module, expressed in hertz (Hz). It indicates how many cycles per second the RAM can perform and is typically reported as MHz or GHz. This value helps users compare performance potential across different memory types and system configurations.
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MHz |
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Motherboard form factor The physical layout and size classification of a motherboard, such as ATX, Micro‑ATX, Mini‑ITX, or other standardized formats. It indicates the dimensions, mounting points, and expansion capabilities that determine compatibility with computer cases and components.
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ATX MicroATX Mini-ITX |
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Number of expansion slots The total count of physical expansion slots available on a computer case for installing additional hardware such as PCI‑Express cards, USB adapters or other peripheral modules. The value is an integer without any unit and represents how many separate slots can be used to expand the system’s capabilities.
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7 |
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Number of fans The total count of individual cooling fans that are part of the product or its components. This value indicates how many separate fan units are installed, such as in a graphics card, CPU cooler, case, or other hardware assemblies.
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2 fan(s) |
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Package depth The linear measurement from front to back or top to bottom of a product’s packaging, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the packaged item is and can be used for fitting, compatibility, or spatial planning.
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535 mm |
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Package Height The vertical dimension of a product’s packaging measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and helps customers assess how tall the package will be when stored or shipped.
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615 mm |
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Package width The horizontal measurement of a product’s packaging, expressed in a linear unit such as millimetres or inches. It indicates how wide the package is from one side to the other and helps customers assess fit for storage, shipping, or display.
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322 mm |
| Power supply included | No |
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Power supply location The physical position where the power supply unit is installed or mounted within a device, such as top, bottom, rear, side, front, or built‑in. This attribute helps users understand where to find the power source and plan cable routing or ventilation.
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Bottom |
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PSU Depth The linear measurement of a power supply unit from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the PSU is and can be used for fitting, compatibility, or spatial planning.
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170 mm |
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PSU Included Indicates whether a power supply unit (PSU) is supplied with the product as part of its standard package. A value of "Yes" means the PSU is included and ready for use, while a value of "No" means no PSU is provided and must be purchased separately.
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No |
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PSU Support A list of power supply unit (PSU) form factors that a product can accommodate, such as ATX, MicroATX, SFX, SFX‑L, E‑ATX, or other standard sizes. Each value represents a distinct PSU type that the product is designed to support.
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ATX |
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Rear fans installed The total count of fan units installed on the rear side of a product or component. The value is an integer greater than zero and represents how many separate fans are present, which can affect cooling performance and noise levels.
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1x 140 mm |
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Reset button Indicates whether the device has a physical reset button that restores factory settings or original configuration when pressed.
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Yes |
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Side window Indicates whether the product includes a side panel window that allows visual access or ventilation to internal components.
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No |
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Supported HDD sizes A list of the physical dimensions of hard drives that a product can accommodate, expressed in inches or millimeters (e.g., "2.5", "3.5", "M.2"). The values are typically separated by commas and indicate which drive form factors fit within the device’s bays or slots.
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2.5,3.5" |
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Supported motherboard form factors A list of the physical layout and size classifications of motherboards that a computer case or chassis supports, such as ATX, Micro‑ATX, Mini‑ITX, E‑ATX, SSI CEB, etc. Each value represents a distinct form factor that can be mounted in the device.
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ATX,Micro ATX,Mini-ATX |
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Type The general category or style of the product, such as laptop, printer cartridge, or cooling fan. It helps buyers quickly identify the nature of the item and compare similar products.
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PC |
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Weight The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.
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9.1 kg (Approx) |
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Width The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.
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233 mm |
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Windows Indicates whether the product is compatible with at least one version of Microsoft Windows. A value "Yes" means the device can run or support a Windows operating system, while "No" indicates incompatibility.
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No |
Kumiko
25-11-2022 08:46
Removing the hard disk case at the front of your computer provides more space and improves airflow. You can still mount 2.5 and 3.5 inch drives behind the motherboard, so there is no need for the traditional hard drive case. If you are building a new machine, I highly recommend using NVME drives for booting. By eliminating the hard disk case, you also enhance airflow throughout the entire case. In my experience, with an i7-8700K processor and a GeForce 980 graphics card, both components remain cool in this case thanks to the included pull fan at the front and push fan at the back. I am currently using a Cooler Master Hyper 212 EVO CPU Air Cooler, but this case also supports water cooling if needed in the future. Despite heavy usage attempts, I have never seen either my CPU or GPU exceed 50 degrees Celsius in temperature.
Kaori D
22-09-2022 03:12
I had no prior experience when I started building my PC, but the case turned out to be quite helpful. Although the instructions were not perfect, they did have separate sections for each component, which made things relatively easy. The case itself appears to be very sturdy and has a minimalist design that I really like. Additionally, the airflow is excellent, and my temperatures never get too high. The fans are also surprisingly quiet compared to those in my PS4, which is a great feature. Moreover, the case came with excellent cable management options including plenty of straps and attachment points for cables. Overall, I would definitely recommend this case to anyone building their first PC or looking for a discreet yet visually appealing option with a large window to showcase their internal components.
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