- Home
- Products
- Power & Cooling
- Rosewill

Rosewill FBM-X5 Micro ATX Mini Tower Desktop Gaming & Office PC Computer Case with Pre-Installed 400W Power Supply, 240mm / 280mm AIO Support, 2X USB 2.0, 2 USB 3.0, 1x 120mm PWM Fan
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
This is a Micro ATX/Mini ITX mini tower case with a pre-installed 400W non-modular power supply, designed for compact office or entry-level gaming builds.
This case is a situational fit because its pre-installed 400W non-modular PSU and compact steel/plastic construction target a specific entry-level market. It works for basic office or light gaming builds where the included power supply is sufficient and space is limited.
If you need more power or better cable management, look for cases that support ATX power supplies and offer modular PSU options.
Regret Score™
High RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Includes a pre-installed 400W non-modular power supply, saving an additional purchase.
- Front panel offers two USB 3.0 and two USB 2.0 ports for peripheral connectivity.
- Supports front radiators up to 280mm and rear radiators up to 120mm for flexible cooling.
- Accommodates Micro ATX and Mini ITX motherboards, allowing for smaller system footprints.
- Features dust filters, which help maintain internal cleanliness.
- Allows for a maximum GPU length of 340mm, fitting many mid-range graphics cards.
Cons
- The pre-installed 400W power supply is non-modular, potentially leading to more cable clutter.
- Only includes one pre-installed 120mm rear fan, which may limit out-of-the-box airflow.
- Constructed from steel and plastic, which might not feel as premium as aluminum cases.
- Offers limited internal storage with one 3.5" bay and two 2.5" drive bays.
- Lacks a side panel window, preventing a view of internal components.
Dimension Scores
The pre-installed 400W non-modular power supply is adequate for entry-level systems but offers limited headroom for more powerful components.
With only one pre-installed 120mm fan, additional fans are likely needed for effective cooling under load, potentially increasing overall system noise.
The case is constructed from steel and plastic, with side panels described as rigid, which is typical for its price band.
While advertised as having 'optimized cable management,' the non-modular PSU can make clean cable routing challenging in a compact space.
Best For
- Budget-conscious office PC builds needing a compact footprint.
- Entry-level gaming systems with Micro ATX or Mini ITX motherboards.
- Users who prefer a case with a power supply included to simplify purchasing.
- Compact HTPC (Home Theater PC) setups where space is a concern.
Not Recommended For
- High-performance gaming rigs requiring more than 400W or a modular PSU.
- Enthusiasts who prioritize extensive internal storage or advanced liquid cooling loops.
- Builders seeking premium materials or a tempered glass side panel for aesthetics.
Watch Out For
- The non-modular 400W power supply can make cable management challenging, especially in a compact chassis.
- With only one pre-installed 120mm fan, additional fans are necessary for optimal airflow, particularly for gaming components.
- Maximum CPU cooler height is 160mm, which restricts options for larger air coolers.
- The compact size means installing components, especially with an older motherboard, can be a tight squeeze.
Full Specifications
| ASIN | B0FVQNGFBG |
| Brand | Rosewill |
| Color | Black |
| Series | FBM-X5-400 |
| Material | Aluminum |
| Case Type | Mid Tower |
| Model Name | FBM-X5-400 |
| Item Weight | 10 pounds |
| Manufacturer | Rosewill |
| Cooling Method | Air |
| Item model number | FBM-X5-400 |
| Product Dimensions | 15.2 x 7.8 x 15.2 inches |
| Item Dimensions LxWxH | 15.2 x 7.8 x 15.2 inches |
| Number of USB 3.0 Ports | 2 |
| Motherboard Compatability | Micro ATX, Mini ITX |
| Power Supply Mounting Type | Bottom Mount |
| Recommended Uses For Product | Business |
What Buyers Say
This case is a straightforward, no-frills option that includes a power supply, which is a big plus for budget builds. The compact size is great for smaller desks, but it means you'll be working in a tight space, especially when routing the non-modular PSU cables. While it supports AIOs, the single pre-installed fan suggests you'll need to invest in more cooling if you're pushing anything beyond basic tasks.
“Look, it's cheap and it comes with a PSU, so I guess it's fine if you just need something to hold your basic parts, but don't expect fancy cable routing or quiet operation without buying more fans.”
Common Praise
- The inclusion of a 400W power supply simplifies the build process and reduces initial cost.
- Its compact dimensions make it suitable for desks with limited space.
- The case supports Micro ATX and Mini ITX motherboards for smaller form factor builds.
- Front panel USB 3.0 ports provide faster data transfer for modern peripherals.
Common Complaints
- The non-modular power supply creates excess cables that can be difficult to manage.
- Only one 120mm fan is included, which may not provide sufficient airflow for warmer components.
- The steel and plastic construction, while sturdy, doesn't offer a premium feel.
- Limited drive bays (one 3.5", two 2.5") restrict storage expansion options.
Ownership Tips
- The pre-installed PSU cables are often stiff and can be hard to bend and hide effectively.
- Dust buildup can be noticeable if additional intake fans aren't added, despite the filters.
- The compact interior means you really need to plan component installation order to avoid frustrating tight squeezes.
- The single rear fan can become audible under moderate system load, especially if other components generate heat.
Frequently Asked Questions
What size motherboards can fit in this case?
The Rosewill FBM-X5 supports Micro ATX and Mini ITX motherboards.
Does the case come with a power supply?
Yes, it includes a pre-installed 400W non-modular power supply.
How many fans are included with the case?
The case comes with one pre-installed 120mm fan located at the rear.
What is the maximum graphics card length supported?
You can install graphics cards up to 340mm in length.
Can I install a liquid cooler in this case?
Yes, it supports a 240mm or 280mm radiator in the front and a 120mm radiator in the rear.
Buying Guide
When you're looking at a PC case like this, you're essentially buying a shell for your computer parts and, in this instance, a basic power supply. You need to think about what kind of motherboard you have (Micro ATX or Mini ITX for this one), how big your graphics card is, and if you plan on adding a lot of storage drives. The included power supply is a big factor; it saves money but might limit future upgrades or make cable management a headache.
Compatible Motherboard Sizes (Micro ATX, Mini ITX)
This tells you which size motherboards will physically fit inside the case. Micro ATX and Mini ITX are smaller than standard ATX, meaning your overall PC will be more compact, but you'll have fewer expansion slots and RAM slots on the motherboard itself.
Pre-Installed 400W Non-Modular Power Supply
A power supply is like the heart of your PC, delivering electricity to all components. 400W is enough for basic systems and some entry-level graphics cards. 'Non-modular' means all the cables are permanently attached, so you'll have extra wires to tuck away even if you don't use them all, making cable management trickier.
Max GPU Length (340mm)
This is crucial for gamers. Your graphics card needs to be shorter than this measurement to fit inside the case. High-end graphics cards can be quite long, so always check your GPU's dimensions against this spec.
Cooling Options (1x 120mm PWM fan, 240mm/280mm AIO support)
Good cooling keeps your components from overheating. This case comes with one fan, which is minimal. The ability to add more fans or a liquid cooler (AIO) means you can improve airflow and cooling performance, especially if you're running demanding applications or games.
Alternatives
If this case doesn't fit your needs, look for cases that support ATX motherboards for more expansion, include a higher wattage or modular power supply for better upgrade paths and cable management, or offer more drive bays for extensive storage.



