General Specifications
Form Factor
ATX Mid Tower
Side Panel
Solid
Supported Motherboard Sizes
ATX
Mini-ITX
Micro ATX
EATX
Colors
WHITE
Lighting
None
Power Supply
None
Power Supply Included
No
Supported PSU Form Factors
ATX
Transparent Side Panel
No
Front USB Ports
2x USB Type-A 5Gbps
1x USB Type-C 20Gbps
Max PSU Length
180 mm
3.5" Bays
2 bays
2.5" Bays
2 bays
External 3.5" Bays
Unknown
External 5.25" Bays
Unknown
Power Supply Shroud
Yes
Expansion Slots
7 slots
Riser Expansion Slots
0
Rear-Connect Motherboard Support
No
Physical Specifications
Max GPU Length
368 mm
Length
482 mm
Width
235 mm
Height
500 mm
Volume
56.63 L
Weight
24.85 lbs
Cooling Information
Included Fans
Unknown
Max CPU Cooler
171 mm
Fan Support
Unknown
Radiator Support
Unknown
Product Information
Manufacturer
Fractal Design
Series
Define One
Variant
Unknown
Release Year
2026
Manufacturer Color
White
UPC
None
EAN
None
Part Numbers
None
BuildCores ID
259vqfmhi
Case
Fractal Design Define One White Solid
Form FactorATX Mid Tower
Max GPU Length368 mm
Side PanelSolid
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General Specifications
Form Factor
ATX Mid Tower
Side Panel
Solid
Supported Motherboard Sizes
ATX
Mini-ITX
Micro ATX
EATX
Colors
WHITE
Lighting
None
Power Supply
None
Power Supply Included
No
Supported PSU Form Factors
ATX
Transparent Side Panel
No
Front USB Ports
2x USB Type-A 5Gbps
1x USB Type-C 20Gbps
Max PSU Length
180 mm
3.5" Bays
2 bays
2.5" Bays
2 bays
External 3.5" Bays
Unknown
External 5.25" Bays
Unknown
Power Supply Shroud
Yes
Expansion Slots
7 slots
Riser Expansion Slots
0
Rear-Connect Motherboard Support
No
Physical Specifications
Max GPU Length
368 mm
Length
482 mm
Width
235 mm
Height
500 mm
Volume
56.63 L
Weight
24.85 lbs
Cooling Information
Included Fans
Unknown
Max CPU Cooler
171 mm
Fan Support
Unknown
Radiator Support
Unknown
Product Information
Manufacturer
Fractal Design
Series
Define One
Variant
Unknown
Release Year
2026
Manufacturer Color
White
UPC
None
EAN
None
Part Numbers
None
BuildCores ID
259vqfmhi
