With the UMX4 and the RM3, we present two outstanding cases, both of which stand out due to their appealing exterior. Due to the combination of high-quality materials, flawless manufacturing and an eye for details, our cases stand out from the grey mass of the case market.


The UMX4 is the predecessor to the UMX2. It’s designed to house ATX motherboards and offers an efficient ventilation system, as well as generous space for a powerful system with multiple VGA cards.

The UMX4 combines a classic exterior design and a very stable chassis made from massive steel. When comparing the UMX4 to the UMX2, it’s obvious that the interior has been massively redesigned to offer a better hardware compatibility.

There are four dedicated installation spots for 2.5 inch SSD as well as two 3.5 inch mounting frames are readily available. Three 120 mm fans (2 x top, 1 x rear) are already preinstalled, two additional 120 mm fans can be mounted at the bottom of the case.


The RM3 is the predecessor to the popular RM1. The refined Mini-Tower can be equipped with both Mini-ITX or Micro-ATX motherboards and stands out due to its very clean interior design. Despite the compact dimensions of the case, users can still install VGA cards with a length of up to 310 mm and CPU coolers with a height of 170 mm.

Both side panels of the RM3 are made of 5 mm strong tempered glass, giving the case – in combination with the classic aluminum exterior – an exquisite look. The illuminated Jonsbo-Logo underneath the motherboard tray is thus easily visible for maximum effect. The steel chassis guarantees the case optimal stability.

The inner space of the case has been divided in two, where the PSU is mounted in a separate space below the motherboard. Three 2.5 inch drives – one behind the motherboard tray, two on the PSU cover – as well as two 3.5 inch drives behind the front cover, can be mounted in the case. Three fans are already installed – one 140 mm fan underneath the top, one each 120 mm fans in the rear and on the bottom of the case. A generous cable management allows a very clean and unobtrusive installation of the cables.

All cases are available in stores now. The MSRP for the UMX4 is 149.99 Euro for the windowless edition. The cases with tempered glass are 159.99 Euro. The MSRP of the RM3 is 109.99 Euro. All prices include 19% VAT.

Our Jonsbo cases are sold in Europe under the label “Jonsbo – powered by Cooltek”.

Technical Data UMX4:

Form Factor: ATX, Micro-ATX, Mini-ITX

Installation options for HDD/SSD: 2 x 3.5 inch, 4 x 2.5 inch

Case fan (Top): 2 x 120 mm

Case fan (Rear): 1 x 120 mm

Case fan (Bottom): 2 x 120 mm (optional)

PCI-expansion slots: 7

Height: ca. 437 mm

Width: ca. 207 mm

Depth: ca. 426 mm

Material: Aluminum, Steel

Max. Length of VGA cards: 310 mm

Max. Height of CPU-coolers: 162 mm

4250140370853 4250140370853-1 4250140370853-2 4250140370853-3 4250140370853-4 4250140370853-5 4250140370853-6 4250140370853-7 4250140370853-8 4250140370853-9 4250140370853-10 4250140370853-11


Technical Data RM3:

Standard: Micro-ATX, Mini-ITX

Mounting options for HDD/SSD: 2 x 3.5 inch, 3 x 2.5 inch or 5 x 2.5 inch

Case fan (Top): 1 x 140 mm

Case fan (Rear): 1 x 120 mm

Case fan (Bottom): 1 x 120 mm

PCI-expansion slots: 4

Height: ca. 385 mm

Width: ca. 215 mm

Depth: ca. 336 mm

Material: Aluminum, Steel, tempered Glass

Max. Length of VGA cards: 310 mm

Max. Height of CPU-coolers: 170 mm

4250140354907 4250140354907-1 4250140354907-2 4250140354907-3 4250140354907-4 4250140354907-5 4250140354907-6