Overview
Build a small gaming PC, that delivers a chic aesthetic with the Jonsbo RM3 Plus Micro-ATX PC Case. This SFF case features a spacious main chamber, perfect for facilitating a wide range of hardware, including Mini-ITX or Micro-ATX motherboards, a powerful processor, and a CPU cooler up to 170mm tall. What’s more, with four expansion slots and 310mm GPU clearance, this case can easily support a high-end GPU. Beneath the main interior, the RM3 boasts a large PSU chamber capable of housing ATX PS2 power supplies up to 165mm long. The Jonsbo RM3 is a fantastic addition to any battlestation, as its small footprint is ideal for space limited set-ups. Plus, with brushed aluminium panels, a tempered glass side panel, and rounded corners, this case boasts chic aesthetic that will complement any set-up.
Jonsbo RM3 Micro-ATX PC Case at a Glance:
- Micro-ATX PC case compatible with Mini-ITX and Micro-ATX motherboards
- Install powerful GPUs up to 310mm in length
- Stylish design with brushed aluminium panels and a tempered glass side panel
- Fully featured front I/O panel
- Space to mount up to three fans with two pre-installed
- Multiple mounting points for 3.5" and 2.5" storage drives
Small Yet Spacious
The Jonsbo RM3 is an outstanding choice for gamers with limited room, measuring 215mm x 336mm x 385mm (WxDxH), it boasts a small footprint. Thanks to this, you can easily build a fantastic gaming set-up with a PC, monitor, and peripherals, even with limited desk space.
Even with its small size, this case offers excellent support for gaming hardware. The main chamber can facilitate Mini-ITX and Micro-ATX motherboards, perfect for pairing with a powerful CPU from AMD or Intel. Alongside this, the four expansion slots and 310mm GPU clearance ensure there is room for a powerful graphics card, such as an NVIDIA RTX 4070 Super or AMD Radeon RX 7800XT.
Simple Yet Effective Cooling
Creating an effective cooling solution is simple with the Jonsbo RM3. This case features three locations for mounting cooling fans. At the top of the case, there is space for a 140mm fan, a 120mm fan can also be installed on the rear panel, and a second 120mm fan can be mounted to the top of the PSU chamber. Jonsbo has included both a 140mm and 120mm fan pre-installed on the top and rear panels of the RM3, for efficient cooling out the box.
The Jonsbo RM3 offers two options for CPU cooling. With 170mm CPU clearance, there is ample room for installing a tower air cooler with large heat sink, perfect for optimum thermal performance. Alternatively, it is also possible to mount a 120mm radiator to the rear panel, facilitating the use of AIO liquid coolers.
Beautiful Design
Building a stylish PC is easy with the Jonsbo RM3, as it offers a sleek aesthetic and excellent cable management options. The outer shell features rounded edges for the top and bottom of the case, for a smooth, modern design. These panels are manufactured from aluminium, which are finished in black, with the front panel also boasting a brushed metal effect. In addition to this chic frame, the Jonsbo RM3 is equipped with two tempered glass side panels, offering a clear view inside the case from the left or right.
With these panels, you can effectively display your gaming hardware. From the left-hand side, you can showcase your motherboard and CPU, alongside any RGB lighting on fans and RAM modules, creating an impressive display. Meanwhile, the right side is ideal for showing off your cable management skills. This case offers multiple points for fixing cable ties to, allowing you to create super-clean cable runs. Plus, the large PSU chamber is ideal for storing away excess wires and is easy to conceal thanks to the light tint of the tempered glass.
Specifications
| Additional Contents | Fans Included Yes Included fans 1x 120 mm, 1x 140 mm Fan Support Case Fan Support (Top) 140mm Fan (1x) Case Fan Support (Bottom) 120mm Fan (1x) Case Fan Support (Rear) 120mm Fan (1x) Max. Number of Fans 2 120 mm fans 2 140 mm fans 1 Mounting Case VESA Mountable No Internal Monitor Mount No Internal Dimensions Max. CPU Cooler Height 170 mm Max. GPU Length 310 mm Max. PSU Length / Depth 165 mm Back Connect Back Connect No Case Features I/O position Front Side panel with window Vertical GPU Mount No Adjustable Vertical GPU Bracket No Front door No Cable Management Yes Filters Included Yes Noise dampening No Mainboard slide / tray No Remote included No Transport System No Power Supply PSU included No PSU Format ATX Power Supply Position rear bottom Colour Primary Colour Black Fan Main Colour (Frame) Black Materials Materials Aluminium, Steel, Tempered Glass Dimensions Length / Depth 336 mm Width 215 mm Height 385 mm Weight 7.3 kg Motherboard Support Compatible Motherboard Formats Micro-ATX, Mini-ITX Max. Motherboard Format Micro-ATX Drive Bays Max. 2.5 Inch Drives 5 Max. 3.5 Inch Drives 2 Max. 5.25 Inch Drives 0 2.5 inch internal drive bay 3 1x 3.5 / 1x 2.5 Inch Internal Drive Bays (combined) 2 Hot swap drive bays No Compliance Compliance Documents Jonsbo PC Case Compliance and Safety Fan Header Fan Controller / Fan Hub No Display Display Included No Radiator Support Max. Radiator Compatibility 1x Single (120 mm) Radiator/AIO Support (Rear) 120mm Radiator Lighting Lighting / RGB No Fan / RGB control No Case Case Type Mini Case Features Housing Feedthrough No Expansion Slots Expansion slots / PCI slots 4 External Ports Front I/O – USB Type C Ports Total 0 Front I/O – USB Type A Ports Total 2 USB 3.0 (external) Type A 2 Audio outputs & inputs 1x output + 1x input (3.5 mm jack, 3-pin, TRS) Cable Specifications Riser Cable Included No Connectivity Card reader No |
|---|---|
| Fans Included | Yes |
| Included fans | 1x 120 mm, 1x 140 mm |
| Case Fan Support (Top) | 140mm Fan (1x) |
| Case Fan Support (Bottom) | 120mm Fan (1x) |
| Case Fan Support (Rear) | 120mm Fan (1x) |
| Max. Number of Fans | 2 |
| 120 mm fans | 2 |
| 140 mm fans | 1 |
| Case VESA Mountable | No |
| Internal Monitor Mount | No |
| Max. CPU Cooler Height | 170 mm |
| Max. GPU Length | 310 mm |
| Max. PSU Length / Depth | 165 mm |
| Back Connect | No |
| I/O position | Front |
| Side panel | with window |
| Vertical GPU Mount | No |
| Adjustable Vertical GPU Bracket | No |
| Front door | No |
| Cable Management | Yes |
| Filters Included | Yes |
| Noise dampening | No |
| Mainboard slide / tray | No |
| Remote included | No |
| Transport System | No |
| PSU included | No |
| PSU Format | ATX |
| Power Supply Position | rear bottom |
| Primary Colour | Black |
| Fan Main Colour (Frame) | Black |
| Materials | Aluminium, Steel, Tempered Glass |
| Length / Depth | 336 mm |
| Width | 215 mm |
| Height | 385 mm |
| Weight | 7.3 kg |
| Compatible Motherboard Formats | Micro-ATX, Mini-ITX |
| Max. Motherboard Format | Micro-ATX |
| Max. 2.5 Inch Drives | 5 |
| Max. 3.5 Inch Drives | 2 |
| Max. 5.25 Inch Drives | 0 |
| 2.5 inch internal drive bay | 3 |
| 1x 3.5 / 1x 2.5 Inch Internal Drive Bays (combined) | 2 |
| Hot swap drive bays | No |
| Compliance Documents | Jonsbo PC Case Compliance and Safety |
| Fan Controller / Fan Hub | No |
| Display Included | No |
| Max. Radiator Compatibility | 1x Single (120 mm) |
| Radiator/AIO Support (Rear) | 120mm Radiator |
| Lighting / RGB | No |
| Fan / RGB control | No |
| Case Type | Mini Case |
| Housing Feedthrough | No |
| Expansion slots / PCI slots | 4 |
| Front I/O – USB Type C Ports Total | 0 |
| Front I/O – USB Type A Ports Total | 2 |
| USB 3.0 (external) Type A | 2 |
| Audio outputs & inputs | 1x output + 1x input (3.5 mm jack, 3-pin, TRS) |
| Riser Cable Included | No |
| Card reader | No |
Specifications
| Manufacturer | Jonsbo |
|---|---|
| Manufacturer part number | RM3 BLACK |
| OcUK SKU | CA-00F-JB |
| EAN | 6970620550350 |
| Back Connect | No |
| Case Type | Mini Case |
| Fan Main Colour (Frame) | Black |
| Included fans | 1x 120 mm, 1x 140 mm |
| Lighting / RGB | No |
| Power Supply Position | rear bottom |
| Primary Colour | Black |
| PSU Format | ATX |
Product reviews
No review for this product yet.
Warranty & Delivery
Click & Collect
Collect from OcUK HQ, or one of thousands of DPD Pickup Points around the UK.*
Full Delivery InformationIE Delivery
We ship to Ireland, with tax and customs included in the price you pay.*
Full Delivery Information*Exclusions and product restrictions apply
Jonsbo RM3-Black/Window Micro-ATX
Micro-ATX PC case, Steel, aluminium, and tempered glass construction, Supports up to five storage drives, Mounting points for three cooling fans, Maximum GPU clearance of 310mm, Supports Mini-ITX a...
Only available to UK and IE
Order within — with Premium Delivery (arriving 1 working day, Mon–Fri) for UK mainland delivery.
Klarna Pay in 3 interest-free instalments, or pay in 30 days.







