The Fractal Design Define One Light Solid is a stylish white Midi Tower PC case designed for builders who value clean aesthetics and practical functionality. Constructed from steel and available in a crisp white finish, this ATX mid-tower supports ATX, Micro-ATX, and Mini-ITX motherboards, making it a versatile choice for a wide range of builds. With dimensions of 235 x 482 x 500 mm and a weight of 11.30 kg, it offers a solid and well-proportioned form factor. A side window adds a visual element to the build, while the absence of illumination keeps things understated and minimal.
Storage and Expansion
The Define One Light Solid offers ample storage options, featuring 2 internal 3.5" bays, 4 dedicated 2.5" bays, and a combined HDD/SSD cage for flexible configuration. One external 5.25" bay is also available for optical drives or other peripherals. With 7 expansion slots, there is plenty of room to grow, and graphics cards up to 370 mm in length are supported. CPU coolers up to 171 mm in height can be accommodated, and power supplies up to 180 mm in length with an ATX form factor fit without issue. Integrated cable management helps keep the interior tidy and airflow unobstructed.
Cooling Capabilities
This case is built with serious thermal management in mind. The front panel supports up to three fans in 120 mm or 140 mm configurations, along with radiators up to 360 mm. The top supports up to two fans and radiators up to 280 mm, while the rear accommodates one fan and a 120 mm radiator. Liquid cooling is fully supported, giving builders the flexibility to install custom or all-in-one cooling solutions throughout the case.
Product number manufacturer:
FD-C-DEFOA-04
Cooling
Front fans diameters supported:
3x 120mm, 3x 140mm
Front radiator sizes supported:
120, 240, 280, 360 mm
Liquid cooling capability:
Top radiator sizes supported:
120, 240, 280 mm
Display
Energy management
Supported power supply form factors:
ATX
Ergonomics
Packaging content
Physical characteristics
Maximum CPU cooler height:
17.1 cm
Maximum graphics card length:
37 cm
Number of expansion slots:
7
Storage media
Number of hard drives supported:
2
Supported hard disk drive sizes:
2.5,3.5"
Weight & dimensions
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