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Fractal Design Define S - Mid Tower Gaming Case - ATX Compatible - High Airflow and Performance Optimized - Includes 2x 140mm Silent Fans - Water-Cooling Ready - Black with Window View
The Fractal Design Define S is a mid-tower computer case designed for high airflow and performance. It includes two Fractal Design Dynamic GP-14 140mm silent fans and is water cooling ready
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Fractal Design Define S – The Ultimate Mid‑Tower Gaming Case
The Fractal Design Define S is engineered for gamers and enthusiasts who demand a blend of high airflow, silent operation, and uncompromised performance. Its sleek black chassis with a transparent side panel showcases your build while its robust construction ensures durability and longevity.
Form Factor & Compatibility
The Define S is a mid‑tower case that supports the most common motherboard sizes: ATX, Micro‑ATX, and Mini‑ITX. With dimensions of 233 mm (width) × 451 mm (height) × 520 mm (depth), it fits comfortably in standard workspaces while providing ample room for high‑end components.
Cooling & Airflow Excellence
Designed with optimal airflow, the case accommodates up to three front fans, one rear fan, and two top fans. The included 2×140 mm silent fans deliver quiet cooling, while additional fan slots allow you to expand your setup for aggressive overclocking or liquid cooling.
The Define S supports radiators of various sizes:
- Front radiator: 120 mm, 140 mm, 240 mm, 280 mm, 360 mm
- Rear radiator: 120 mm, 140 mm
- Top radiator: 120 mm, 140 mm, 240 mm, 280 mm, 360 mm, 420 mm
With a maximum CPU cooler height of 180 mm and GPU length up to 450 mm, you can install the latest high‑performance components without compromise.
Power Supply Placement & Cable Management
The case places the power supply at the bottom rear, allowing for a clean front panel layout. It supports ATX power supplies up to 30 cm in length, ensuring compatibility with most modern units.
Cable management is a key feature: the Define S includes dedicated routing channels and a spacious cable tray that keeps wires tidy and airflow unobstructed. This design not only improves aesthetics but also contributes to better thermal performance.
Storage & Expansion
- Drive bays: Three 3.5" internal slots, two 2.5" internal slots
- Expansion slots: Seven standard motherboard expansion slots for GPUs, sound cards, and more
- Supports a wide range of storage devices, from SSDs to high‑capacity HDDs.
Front Panel & Connectivity
The front panel offers convenient access to essential ports:
- 1× Headphone Out
- 1× Mic In
- 2× USB 3.0 (Type‑A)
- Power Button with LED indicator
- System Reset button
- HDD Activity LED
These features provide a user‑friendly interface while maintaining the case’s clean, minimalist look.
Build Quality & Design Features
- Anti‑dust filter: Keeps internal components free from dust accumulation.
- Side window: Transparent panel allows you to display your RGB lighting or component aesthetics.
- LED indicators: Built‑in LEDs provide status feedback without the need for additional lighting kits.
- Weight: Approximately 8.5 kg, making it sturdy yet manageable for transport and assembly.
Water Cooling Readiness
The Define S is fully water‑cooling ready. Its spacious interior accommodates radiators of various sizes, and the fan mounting options allow you to configure a custom loop that delivers both performance and silence.
Dimensions & Packaging
- Internal dimensions: 233 mm × 451 mm × 520 mm (WxHxD)
- Package size: 322 mm × 615 mm × 535 mm (WxHxD)
- Package weight: 10.2 kg
Conclusion
The Fractal Design Define S stands out as a premium choice for builders who prioritize airflow, silence, and flexibility. Its thoughtful layout, extensive cooling options, and robust build make it an ideal platform for high‑end gaming rigs, content creation workstations, or any system that demands both performance and aesthetics.
| 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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 136.86 EUR  169.00 EUR   |
| Colors
Predominant colors of the product |
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| Tags | Midi Tower Case Black window case Window Midi Tower High Airflow Mid tower ATX mid tower Black Window Define S Windowed mid tower Silent fans Water cooling ready Performance Dynamic GP-14 fan Black window mid tower Silent fans mid tower High airflow mid tower Water cooling ready mid tower Performance mid tower ATX mid tower case Windowed mid tower case Define S Mid Tower Define S ATX Case Define S Black Window Define S High Airflow Define S Performance Silence Define S Water-cooling ready Define S 140mm Fans Define S Dynamic GP-14 Define S Midi Tower Define S Computer Case Define S Optimized For Define S Silent Fans Define S Windowed Define S Mid Tower Case Define S Gaming Case Define S Airflow Performance Define S Quiet Performance Define S Cooling Ready Define S ATX Mid Tower Define S Performance Define S Silence Define S 140mm Silent Fans Define S Black Window Case Define S Windowed Case Define S Water-cooling Ready Case Define S Window Midi Tower Define S Black Window Midi Tower Define S ATX Mid Tower Gaming |
| 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-W |
| MPN | Fractal Design FD-CA-DEF-S-BK-W |
| ID | 1893797 |
| Dimensions / Weight | |
| Key Features | |
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Anti-dust filter Indicates whether the product includes an anti‑dust filter that helps prevent dust accumulation and maintain airflow or performance. A value of "Yes" means a filter is present; "No" means it is absent.
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Yes |
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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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Bottom fans diameters supported The physical diameter of fans that can be installed in the bottom mounting area of a computer case. Values are expressed as a length measurement (e.g., 120 mm or 80 mm) and indicate the maximum fan size that will fit without obstruction. This attribute helps users choose compatible cooling solutions for their case.
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120,140 mm |
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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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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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8 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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Front fans installed Indica los ventiladores que están físicamente instalados en la parte frontal del producto, indicando para cada uno el número de unidades y su diámetro (por ejemplo, "1x 120 mm"). Este atributo permite conocer los tamaños exactos de los ventiladores presentes y facilita la planificación de refrigeración o compatibilidad con accesorios.
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1x 140 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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Liquid cooling capability Indicates whether the product supports liquid cooling, meaning it can use a closed‑loop liquid system to dissipate heat from components such as CPUs or GPUs.
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Yes |
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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 CPU Cooler Height The maximum vertical dimension of a CPU cooling solution measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any computer component where the height of the cooler must be considered for compatibility with cases, motherboards or other hardware.
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180 mm |
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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 cpu cooler height The vertical dimension of a CPU cooler measured from its lowest to highest point, expressed in a physical unit such as millimetres, centimetres or inches. This attribute applies to any computer system where the height of the cooling solution is relevant for compatibility with case clearance and airflow considerations.
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18 cm |
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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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Maximum psu length The maximum linear dimension of a power supply unit that can fit within the product’s enclosure, expressed with a standard length unit such as centimeters or inches. It indicates the longest PSU that can be installed without requiring modifications to the case or chassis.
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30 cm |
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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 3.5" Bays The total count of 3.5‑inch drive bays available in a computer case or enclosure, indicating how many standard hard drives or optical units can be installed.
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3 |
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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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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 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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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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Yes |
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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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8.5 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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Yes |
Allison Michael
30-09-2022 03:22
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. Additionally, removing the hard disk case allows for better airflow throughout the entire case.
In my personal experience, I have a machine with an i7-8700K processor and a GeForce 980 graphics card, both of which stay 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. Even under heavy loads, I have never seen either my CPU or GPU exceed 50 degrees Celsius.
Isidore A
14-01-2023 10:46
I had no experience when I started building my PC, but the case turned out to be quite helpful. Although the instructions weren't perfect, they were divided into sections for each part and made things relatively easy. The case itself is very sturdy and has a minimalist design that I really like. It also has excellent air flow, keeping my temperatures low. The fans are surprisingly quiet compared to my PS4, which is a great bonus. Additionally, the case came with great 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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