Jonsbo U4 Mini Micro ATX case, tempered glass

ITX, Mini-ATX
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Delivered between 2.1.2026 and 14.1.2026
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Product details

The Jonsbo U4 Mini Micro-ATX case combines elegant design with functionality. With a sleek white steel chassis and a tempered glass side panel, it offers an appealing aesthetic that showcases the hardware. The case is compatible with Mini-ITX and Micro-ATX motherboards and provides ample space for high-performance graphics cards with a maximum length of up to 420 mm. The thoughtful design allows for the installation of up to seven 120 mm fans, ensuring effective cooling of the components. The front ports include USB-C 3.1 and USB 3.0, as well as a combined audio jack, making access to essential connections easy. With compact dimensions of 222 x 385 x 440 mm, the case is ideal for users looking to house a powerful gaming or workstation setup in a small form factor.

  • Space for up to 7 fans for optimal cooling
  • Compatible with Mini-ITX and Micro-ATX motherboards
  • Maximum graphics card length of 420 mm
  • Front ports: USB-C 3.1 and USB 3.0
  • High-quality tempered glass for an attractive look.

Key specifications

PC case design
Mini Tower
PC case features
Side windows
Front connections
HeadphonesUSB-C
Max. length graphics card
420 mm
Max. height CPU cooler
165 mm
Max length of power supply
200 mm
Number of 3.5" drive slots (internal)
1x
Item number
39937081

General information

Manufacturer
Jonsbo
Category
PC case
Manufacturer no.
U4 MINI WHITE
Release date
8.11.2023

Colour

Colour
White
Exact colour description
White

Material

Material group
Metal
Material
SteelToughened glass

PC case properties

PC case design
Mini Tower
Form factor
ITXMini-ATX
"Number of 5.25"" drive slots"
1x
Number of 3.5" drive slots (internal)
1x
"Number of 2.5""/3.5"" combination slots"
3x
"Number of 2.5"" drive slots"
1x
Number of expansion card slots
4x
Max. length graphics card
420 mm
Max. height CPU cooler
165 mm
Max length of power supply
200 mm
PC case features
Side windows

Connections

Front connections
HeadphonesUSB-C

Cooling properties

Number of fans
7x
Number of fan slots
7x
Fan location
Bottom sideTop side
Connectable fans (control)
7
Radiator locations
Bottom side
Cooling properties
Water cooling possible

Rear side

Fan mount locations
1x 120mm

Bottom side

Fan mount locations
3x 120mm

Top side

Fan mount locations
3x 120mm3x 140mm
Radiator mount locations
1x max. 280/240mm

HDD Cage

Fans included
Optional fan
Fan mount locations
3x 120mm
Radiator mount locations
partial renunciation of HDD and/or fan slots

Origin

Country of origin
China

Voluntary climate contribution

CO₂-Emission
Climate contribution

Scope of delivery

Scope of delivery
Computer casesInstruction manual

Product dimensions

Height
38.50 cm
Length
44 cm
Width
22.20 cm
Weight
6.34 kg

Package dimensions

Length
52 cm
Width
30 cm
Height
48 cm
Weight
7.80 kg

30-day right of return
24 Months Warranty (Bring-in)
1 additional offer

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «PC case» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 17.Intertech
    0.6 %
  • 21.Cooler Master
    0.7 %
  • 21.Jonsbo
    0.7 %
  • 23.Sharkoon
    0.8 %
  • 24.LC-Power
    0.9 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 8.Cooler Master
    2 days
  • 8.Corsair
    2 days
  • 8.Fractal
    2 days
  • 8.Jonsbo
    2 days
  • 12.Hyte
    3 days

Return rate

How often is a product of this brand in the «PC case» category returned?

Source: Digitec Galaxus
  • 21.Endorfy
    4.8 %
  • 23.Darkflash Tech
    4.9 %
  • 24.Jonsbo
    5.4 %
  • 25.Zalman
    6.2 %
  • 26.Havn
    6.4 %
Source: Digitec Galaxus

Translation: machine translated
Very good87/100
Basic TutorialsSingle testReleaseMay 2024

Let's now come to the conclusion of this test. Overall, the Jonsbo U4 Mini leaves us with a good impression. The mini tower is very well made, looks very elegant thanks to its many curves and should therefore look good on any desk. It also offers plenty of space for both air and water cooling components and hardware in general...