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Fractal Design Define One TG White
Mid-Tower case with tempered glass window, steel sound-dampened panel and three 140 mm fans
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A case combining Scandinavian elegance and quiet performance
The Fractal Define One PC case embodies the perfect combination of a clean Scandinavian design and optimized versatility. Designed for users seeking a balance between aesthetics and functionality, it stands out with its meticulous finishes and advanced sound insulation, ideal for gaming, professional or multimedia setups.
Design and sound insulation
With its aluminium side air intakes and its three pre-installed Momentum 140 mm fans, the Define One optimizes airflow while reducing noise. The tempered glass side panel and the industrial steel sound-dampened front panel ensure a quiet experience without compromising performance. Its tool-free access (top, front, side panels and power supply bracket) makes assembly and maintenance easier.
Compatibility and modularity
The Define One supports Mini ITX, Micro ATX, ATX and E-ATX motherboards, as well as inverted configurations (Reverse Micro ATX, Reverse ATX). It offers extensive compatibility: radiators up to 360 mm at the front, 280 mm on top, and drive mounts (2 x 2.5" brackets and 2 x combined 3.5"/2.5" brackets). Its 7 expansion slots and 37 mm cable management space allow for optimal organization.
Key features:
- Design: Scandinavian style, tempered glass side panel, industrial steel sound-dampened front panel, white color.
- Cooling: 3 Momentum 140 mm fans included (front), mounting points for 6 additional fans (front, top, rear).
- Compatibility: Mini ITX to E-ATX motherboards, GPU up to 368 mm, CPU coolers up to 171 mm, ATX PSU (max. 180 mm).
- Connectivity: 2x USB Type-A 5Gbps, 1x USB Type-C 20Gbps, 1x Audio/Micro Combo Jack.
- Cable management: Dedicated 37 mm space, cable routing channels and hook-and-loop straps.
- Dust filters: Removable filters (front and power supply).
- Dimensions: 482 x 235 x 500 mm (volume: 56,63 L), net weight: 11,2 kg.
Select your criteria
General information |
Product name |
Fractal Design Define One TG White |
Brand |
Fractal Design | |
Model |
FD-C-DEFOA-03 | |
Main characteristics |
Graphic card max. length |
368 mm |
Max height CPU fan |
171 mm | |
Power supply max. length |
180 mm | |
Power format |
ATX/EPS | |
Case format |
Mid tower | |
Use |
Gamer | |
| Office | ||
Material |
Steel | |
Motherboard format |
ATX | |
| E-ATX | ||
| Micro ATX | ||
| Mini ITX | ||
Power supply supplied |
No | |
Design |
Screwless fixing system |
Yes |
Case color |
White | |
Front color |
White | |
Dust filters |
2 | |
Integrated display |
No | |
Glass |
Yes | |
Tempered glass |
Yes | |
Fish tank (panoramic view) |
No | |
LED RGB |
No | |
ARGB LED |
No | |
Water cooling compatible |
Yes | |
Motherboard connector location |
Standard connectors (on the motherboard) | |
| Connectors under the motherboard | ||
Expansion slots |
Number of PCI slots |
7 |
Low profile |
No | |
Number of 2.5" slots |
2 | |
Number of 2.5"/3.5" slots |
2 | |
Front connectivity |
Location of expansion ports |
Top |
Connector(s) available |
2 X USB 3.0 | |
| 1 X 3.5mm Jack Female Stereo | ||
| 1 X USB 3.2 Type C | ||
Cooling |
Fan(s) included |
Yes |
Number of rear fan(s) slots |
1 X 120mm | |
Quantity of rear fan(s) supplied |
0 | |
Number of front fan(s) slots |
3 X 120 or 140mm | |
Quantity of front fan(s) supplied |
3 | |
Number of above fan(s) slots |
2 X 120 or 140mm | |
Quantity of above fan(s) supplied |
0 | |
Water cooling |
AIO radiator compatibility |
120mm radiator |
| 240mm radiator | ||
| 280mm radiator | ||
| 360mm radiator | ||
Front AIO slot(s) |
120mm radiator | |
| 240mm radiator | ||
| 280mm radiator | ||
| 360mm radiator | ||
Above AIO slot(s) |
120mm radiator | |
| 240mm radiator | ||
| 280mm radiator | ||
Rear AIO slot(s) |
120mm radiator | |
Physical characteristics |
Width |
235 mm |
Height |
500 mm | |
Depth |
482 mm | |
Weight |
11.2 kg | |
Volume |
56.63 l | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
|
Safety Information |
Responsible person |
Fractal Gaming AB |
Postal address |
Victor Hasselblads gata 16A 421 31 Va¨stra Fro¨lunda, Sweden | |
Electronic Address |
support@fractal-design.com |
Product referenced on 4 Sep 2026
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